PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
30-W, 48-V INPUT DC/DC CONVERTERS
WITH AUTO-TRACK™ SEQUENCING
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Input Voltage: 36 V to 75 V
30-W Total Output Power
Output Voltages: 3.3 V, 5 V, and 12 V
Wide-Output Adjust/Trim
Up To 88% Efficiency
Overcurrent Protection
Overtemperature Shutdown
Undervoltage Lockout
Input Overvoltage Protection
Auto-Track™ Power-Up Sequencing
(Includes Sequenced Output with PTB48560B)
Smart-Sense Remote Sensing (PTB48560B)
Dual-Logic Enable Control
Space-Saving 1×2 Footprint
Surface Mount Package
1500-Vdc Isolation
Agency Approvals (Pending):
UL/cUL 60950, EN 60950
APPLICATIONS
•
•
•
Intermediate Bus Architectures
Telecom, High-End Computing Platforms
Multi-Rail Power Systems with
Power-Up Sequencing
DESCRIPTION
The PTB48560x is a series of 30–W rated isolated dc/dc converters, designed to operate from a standard -48–V
telecom central office (CO) supply. Housed in a 1×2 package, each model has a wide-adjust output voltage that
can be set to one of the common intermediate bus voltages of 3.3 V, 5 V, or 12 V.
The PTB48560 series incorporates Auto-Track™, a feature that simplifies the power-up sequencing of multiple
power modules and operates from the same intermediate bus. During a power-up cycle, modules with this
feature have the capability of following a common ramp voltage applied to an input called Track. The PTB48560
series is specifically designed to control the Track voltage of any number of nonisolated downstream modules
powered from its output. This ensures that the outputs of the downstream modules all rise simultaneously during
power up. The PTB48560B (3.3 V) has an additional sequenced output, VO Seq, which also rises with the Track
voltage. This allows the VO Seq output to power up simultaneously with the outputs from other power modules
under the control of Auto-Track.
Whether used to facilitate power-up sequencing, or operated as a stand-alone module, the PTB48560 series
includes many other features expected of high-performance dc/dc converter modules. Precise output voltage
regulation is ensured with a differential remote sense. Operational features include an input undervoltage lockout
(UVLO) and a dual-logic output enable control. Overcurrent and overtemperature protection ensure survival
against load faults.Typical applications include distributed power architectures in both telecom and computing
environments, particularly complex digital systems requiring power sequencing of multiple power supply rails.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Auto-Track is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
Typical Circuit
Track
5
PTB48560x
+VI
1
+VI
+Sense*
9
VOSeq (3.3 V) #
See Note (*)
11
VOSeq #
10
VOBus
2
PEN
VOAdjust
3
4
VI
CO ‡
(Required)
8
NEN
VOCOM
-VI
Track
-VI
- Sense
GND Adjust
CO
CI ‡
RSET
6
7
VPOL1
Auto-Track
V
POL Module O
RSET†
Track
Simultaneous Power-Up
VI
VOSeq #
VPOL2
Auto-Track
V
POL Module O
GND Adjust
VPOL1
CI ‡
VPOL2
†
CO
RSET
To Other
POL Modules
# Sequenced output is only available with the PTB48560B.
* The +Sense can be connected to either the VOSeq or VOBus output of the PTB48560B.
† R
SET is required to set the output voltage higher than the minimum value; see the Application Information for values.
‡ The PTB48560x modules require a minimum total output capacitance for proper operation;
see the Electrical Characterisitics for the value required by each model.
2
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
ORDERING INFORMATION
PTB48560 (Base Pt. Number)
Output Voltage Range
Part Number
PTB48560AAH
3.6 V to 5.5 V
PTB48560AAS
PTB48560AAZ
1.8 V to 3.6 V
PTB48560BAH
(4)
PTB48560BAS
(4)
PTB48560BAZ
(4)
PTB48560CAH
9 V to o13.2 V
(1)
(2)
(3)
(4)
DESCRIPTION
Pb – free and RoHS
Compatible
Horizontal T/H
Yes
ERW
No
ERY
Standard SMD
(2)
Optional SMD
(3)
Horizontal T/H
Standard SMD
(2)
Optional SMD
(3)
Horizontal T/H
(1)
Package Ref.
Yes
Yes
ERW
No
ERY
Yes
Yes
ERW
ERY
PTB48560CAS
Standard SMD
(2)
No
PTB48560CAZ
Optional SMD
(3)
Yes
See the applicable package reference drawing for the dimensions and PC board layout.
Standard option specifies 63/37, Sn/Pb pin solder material.
Lead (Pb) – free option specifies Sn/Ag pin solder material.
Includes an Auto-Track compatible output, VO Seq, which sequences with the Track control during power up.
ABSOLUTE MAXIMUM RATINGS
PTB48560x
Continuous
VI
Input Voltage
V(Track)
Track input voltage
I(Track) max
Track input current
TA 1
Operating temperature range
Over VI range
Overtemperature protection
PCB temperature (near pin 1)
Wave solder temperature
Surface temperature of module
or pins (5 seconds)
PTB48560xAH
260 (3)
T(REFLOW)
Solder reflow temperature
Surface temperature of module
or pins
PTB48560xAS
235
(3)
PTB48560xAZ
260
(3)
Tstg
Storage temperature
T(WAVE)
(1)
(2)
(3)
Surge, 1 s max
UNIT
75
100 (1)
V
0 to VO Bus + 0.3
From external source
10
(2)
mA
–40 to 85
115
°C
–40 to 125
The converter's internal protection circuitry may cause the output to turn off when the applied input voltage is greater than 75 V.
When the Track input is fed from an external voltage source, the input current must be limited. A 2.74-kΩ value series resistor is
recommended.
During solder reflow of SMD package version, do not elevate the module PCB, pins, or internal component temperatures this peak
temperature.
PACKAGE SPECIFICATIONS
PTB48560x (Suffixes AH and AS)
Weight
13.6 grams
Flammability
Meets UL94V-O
Mechanical shock
Per Mil-STD-883D, Method 2002.3, 1 ms,
1/2 Sine, mounted
Mechanical vibration
(1)
Mil-STD-883D, Method 2007.2, 20-2000 Hz,
PCB mounted
Horizontal T/H (Suffix AH)
500 Gs
Horizontal SMD (Suffix AS)
250 G
Horizontal T/H (Suffix AH)
20 G
Horizontal SMD (Suffix AS)
5G
(1)
(1)
(1)
(1)
Qualification limit.
3
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
PTB48560B ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, TA = 25°C, VI = 48 V, VO = 3.3 V, CO = 220 µF, and IO = IOmax)
PARAMETER
Input voltage range
IO Seq
0
4
(3)
Sum total, (IO Bus + IO Seq)
0.25
Over IO range
36
Load regulation
Over IO range
±13
Total output voltage variation
Includes set-point, line, load, –40°C ≤ TA ≤ 85°C
Adjust range
Over VI range
Track input (pin 5)
±2
1.8
82%
RSET = 40.2 kΩ, VO = 2.5 V
79%
RSET = open , VO = 1.8 V
74%
Recovery time
Output enable inputs (pins 2, 3)
(2)
(3)
(4)
(5)
(6)
4
mVpp
100
µs
mV
0
0.1
Input high voltage (VIH)
2
Input low voltage (VIL)
-0.2
Shutdown, followed by autorecovery
VO Bus
(5)
1
Open
(6)
0.8
0.48
8
34
VI decreasing
33
500
V/ms
V
mA
16
12
VI increasing
mA
A
V
Over VI range
400
External output capacitance
Between both outputs and VO COM
220
Isolation voltage
Input-output
Isolation capacitance
Input-output
Isolation resistance
Input-output
10
MΩ
Reliability
Telcordia SR-332 50% stress, TA = 40°C, ground
benign
3.6
106 Hr
Internal input capacitance
(1)
50
mA
Overcurrent threshold
Switching frequency
V
±150
Input low current (IIL)
ƒS
mV
%VO
-0.13
Pins 2 and 3 open
Undervoltage lockout
(4)
VO over/undershoot
Standby input current
UVLO
±33
±3
mV
Track connected to -Sense
Open-circuit voltage
Referenced to -VI
±33
3.6
RSET = 5.36 kΩ, VO = 3.3 V
Input slew rate limits
MTBF
%VO
±7
0.1 A/µs load step,
50% to 100%
IOmax
V
%VO
Over VI range
Transient response
75
±0.5
Line regulation
20-MHz bandwidth
A
(4)
±1
Input current
IO (tot)
48
-40°C ≤ TA ≤ 85°C
VO Ripple (peak-to-peak)
UNIT
8
Temperature variation
Efficiency
η
MAX
(2)
0.25
Set-point voltage tolerance
VO
TYP
8
IO Bus
Output current
VI
MIN
(1)
Over VI range
IO
PTB48560B
TEST CONDITIONS
600
kHz
5,000
µF
1
1,500
µF
Vdc
2,000
pF
The converter requires a minimum load current at either the VO Seq or VO Bus output for proper operation. The converter is not
damaged when operated under a no-load condition.
See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures.
When load current is supplied from the VO Seq output, the module exhibits higher power dissipation and slightly lower operating
efficiency.
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1%, with 100 ppm/°C temperature stability.
When controlling the Track input from an external source, the slew rate of the applied signal must be greater than the minimum limit.
Failure to allow the voltage to completely rise to the voltage at the VO (bus) output, at no less than the minimum specified rate, may
thermally overstress the converter.
The PEN and NEN inputs each have an internal pullup resistor. If the enable feature is not used, the PEN input (pin 2) should be left
open circuit and the NEN input (pin 3) permanently connected to –VI. A discrete MOSFET or bipolar transistor is recommended for the
enable control. The open-circuit voltage is less than 10 V. See the Application Information for a more detailed description.
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
PTB48560A ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, TA = 25°C, VI = 48 V, VO = 5 V, CO = 220 µF, and IO = IOmax)
PARAMETER
PTB48560A
TEST CONDITIONS
IO
Output current
Over VI range
VI
Input voltage range
Over IO range
MIN
IO Bus
0.25
(1)
%VO
Over VI range
±0.2
±1
%VO
Load regulation
Over IO range
±0.4
±1
%VO
Total output voltage variation
Includes set-point, line, load, –40°C ≤ TA ≤ 85°C
(3)
%VO
Adjust range
Over VI range
VO Ripple (peak-to-peak)
20-MHz bandwidth
Transient response
0.1 A/µs load step,
50% to 100%
IOmax
Input current
±2
3.6
5.5
Recovery time
100
µs
VO over/undershoot
±150
mV
Track connected to -Sense
–0.2
mA
1
Open-circuit voltage
0
Input high voltage (VIH)
2
Input low voltage (VIL)
-0.2
VO Bus
0.48
8
9
VI increasing
34
VI decreasing
33
Over VI range
(4)
0.8
Shutdown, followed by autorecovery
Switching frequency
%VO
Open
Pins 2 and 3 open
ƒS
V
84%
Standby input current
Undervoltage lockout
±3
RSET = 14.3 kΩ, VO =5 V
Overcurrent threshold
UVLO
400
Internal input capacitance
(4)
%VO
Line regulation
Input low current (IIL)
(2)
(3)
V
(3)
±0.5
Output enable inputs (pins 2, 3)
(1)
75
A
-40°C ≤ TA ≤ 85°C
Referenced to -VI
MTBF
(2)
UNIT
Temperature variation
Track input (pin 5)
IO Bus
48
±1
Efficiency
η
MAX
6
36
Set-point voltage tolerance
VO
TYP
500
mA
16
mA
A
V
600
1
220
V
kHz
µF
External output capacitance
Between both outputs and VO COM
Isolation voltage
Input-output
5,000
Isolation capacitance
Input-output
Isolation resistance
Input-output
10
MΩ
Reliability
Telcordia SR-332 50% stress, TA = 40°C, ground
benign
3.6
106 Hr
1,500
µF
Vdc
2,000
pF
The converter requires a minimum load current for proper operation. The converter is not damaged when operated under a no-load
condition.
See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures.
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1%, with 100 ppm/°C temperature stability.
The PEN and NEN inputs each have an internal pullup resistor. If the enable feature is not used, the PEN input (pin 2) should be left
open circuit and the NEN input (pin 3) permanently connected to –VI. A discrete MOSFET or bipolar transistor is recommended for the
enable control. The open-circuit voltage is less than 10 V. See the Application Information for a more detailed description.
5
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
PTB48560C ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, TA = 25°C, VI = 48 V, VO = 12 V, CO = 100 µF, and IO = IOmax)
PARAMETER
PTB48560C
TEST CONDITIONS
IO
Output current
Over VI range
VI
Input voltage range
Over IO range
MIN
IO Bus
0.1
(1)
%VO
Over VI range
±0.2
±1
%VO
Load regulation
Over IO range
±0.4
±1
%VO
Total output voltage variation
Includes set-point, line, load, –40°C ≤ TA ≤ 85°C
(3)
%VO
Adjust range
Over VI range
VO Ripple (peak-to-peak)
20-MHz bandwidth
Transient Response
0.1 A/µs load step,
50% to 100%
IOmax
Input current
±2
9
88%
RSET = open, VO = 9 V
86%
1
V
%VO
Recovery time
100
µs
VO over/undershoot
±150
mV
Track connected to -Sense
Open-circuit voltage
0.48
0
Input high voltage (VIH)
2
Input low voltage (VIL)
-0.2
Input low current (IIL)
IO Bus
Overcurrent threshold
Shutdown, followed by autorecovery
UVLO
Undervoltage lockout
ƒS
Switching frequency
mA
VO Bus
Open
(4)
0.8
–0.48
8
VI increasing
34
VI decreasing
33
Over VI range
400
Between both outputs and VO COM
100
500
mA
A
V
600
kHz
1,500
µF
1
1,500
V
mA
16
3.75
Internal input capacitance
External output capacitance
±3
13.2
RSET = 9.09 kΩ, VO =12 V
Pins 2 and 3 open
6
%VO
Line regulation
Standby input current
(4)
V
(3)
±0.5
Output enable inputs (pins 2, 3)
(2)
(3)
75
A
-40°C ≤ TA ≤ 85°C
Referenced to -VI
(1)
(2)
UNIT
Temperature variation
Track input (pin 5)
MTBF
48
±1
Efficiency
η
MAX
2.5
36
Set-point voltage tolerance
VO
TYP
µF
Isolation voltage
Input-output
Isolation capacitance
Input-output
Vdc
Isolation resistance
Input-output
10
MΩ
Reliability
Telcordia SR-332 50% stress, TA = 40°C, ground
benign
3.4
106 Hrs
2,000
pF
The converter requires a minimum load current for proper operation. The converter is not damaged when operated under a no-load
condition.
See temperature derating curves for safe operating area (SOA), to determine output current derating at elevated ambient temperatures.
The set-point voltage tolerance is affected by the tolerance and stability of RSET. The stated limit is unconditionally met if RSET has a
tolerance of 1%, with 100 ppm/°C temperature stability.
The PEN and NEN enable inputs each have an internal pullup resistor. If the enable feature is not used, the PEN input (pin 2) should be
left open circuit and the NEN input (pin 3) permanently connected to –VI. A discrete MOSFET or bipolar transistor is recommended for
the enable control. The open-circuit voltage is less than 10 V. See the Application Information for a more detailed description.
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
TERMINAL FUNCTIONS
TERMINAL
NAME
NO.
DESCRIPTION
+VI (1)
1
The positive input for the module with respect to -VI. When powering the module from a negative input voltage,
this input is connected to the input source ground.
-VI (1)
4
The negative input supply for the module, and the 0-V reference for the PEN and NEN enable inputs. When
powering the module from a positive source, this input is connected to the input source return.
PEN
(1)
2
An open-collector (open-drain) positive logic input that is referenced to -VI. When this input is pulled to -VI
potential the converter output is disabled. This input must be open circuit for the converter to operate. The
converter then produces an output whenever a valid input source is applied.
NEN
(1) (2)
3
An open-collector (open-drain) negative logic input that is referenced to -VI. This input must be pulled to -VI
potential to enable the converter. When the input is open circuit, the converter output is disabled. If the enable
feature is not used, this input should be permanently connected to -VI. The module then produces an output
whenever a valid input source is applied.
VO Bus
10
This is the positive power output with respect to VO COM, and the main output from the converter. It is dc isolated
from the input power pins and produces a valid output voltage approximately 20 ms before the voltage at the
Track terminal is allowed to rise. This provides the required standby power source to any downstream nonisolated
modules in power-up sequencing applications.
VO Seq
11
This is a sequenced output voltage from the converter that is controlled by the Track terminal during power-up
transitions. It is only available to the PTB48560B, and used with the output voltage set to 3.3 V (an I/O supply
voltage). During power up, the voltage at VO Seq rises with the Track terminal, typically 20 ms after the VO Bus
output has reached regulation.
VO COM
6
This is the output power return for both the VO Bus and VO Seq output voltages. This terminal should be
connected to the common of the load circuit.
Track
5
This terminal is used in power-up sequencing applications to control the output voltage of Auto-Track compatible
modules, powered from the converter VOBus output. This includes the converter VOSeq output on the
PTB48560B. The converter Track control has an internal transistor, which holds the voltage close to VOCOM
potential for approximately 20 ms (40 ms with the PTB48560C) after the VOBus output is in regulation. Following
this delay, the Track voltage and VOSeq rises simultaneously with the output voltage of all other modules
controlled by Auto-Track.
–Sense
7
Provides the converter with a remote sense capability when used with +Sense. For optimum output voltage
accuracy, this pin should always be connected to VOCOM, close to the load circuit. This terminal is also the
reference connection for both the output voltage set-point resistor and Track control.
VO Adjust
8
A resistor must be connected between this terminal and -Sense to set the converter output voltage. A 0.05-W
rated resistor may be used, with tolerance and temperature stability of 1% and 100 ppm/°C, respectively. If left
open circuit, the converter output voltage defaults to its lowest value. The specification table gives the standard
resistor values for the most common output voltages.
+Sense
9
The +Sense pin can be connected to VOBus (or VOSeq) output. When connected to VOSeq, remote sense
compensation is delayed until the converter's power-up sequence is complete. The voltage at VOBus is also
raised slightly. The +Sense input may be left open circuit, but connecting it to one of the output terminals improves
load regulation of that output.
(1)
(2)
These functions indicate signals electrically common with the input.
Denotes negative logic: Low (–VI) = Normal operation, Open = Output off
7
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
TYPICAL CHARACTERISTICS
PTB48560B Characteristic Data (VO = 3.3 V)
(1) (2)
EFFICIENCY
vs
OUTPUT CURRENT
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
60
90
VO - Output Voltage Ripple - mVPP
VI = 36 V
Efficiency - %
80
VI = 75 V
70
VI = 60 V
60
VI = 48 V
50
40
50
VI = 75 V
40
VI = 60 V
30
20
0
30
0
1
2
3
4
5
6
7
VI = 48 V
VI = 36 V
10
8
IO - Output Current - A
0
1
2
3
4
5
6
7
8
IO - Output Current - A
Figure 1.
Figure 2.
POWER DISSIPATION
vs
OUTPUT CURRENT
TEMPERATURE DERATING
vs
OUTPUT CURRENT
90
7
400 LFM
5
Ambient Temperature − 5 C
PD- Power Dissipation - W
80
VI = 75 V
6
VI = 60 V
4
VI = 48 V
3
VI = 36 V
2
1
0
0
1
2
3
4
5
6
IO - Output Current - A
Figure 3.
(1)
(2)
8
7
8
70
200 LFM
60
100 LFM
50
40
Nat
conv
30
20
0
2
4
6
IO − Output Current − A
8
Figure 4.
All data listed in Figure 1, Figure 2, and Figure 3 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum
rated operating temperature. Derating limits apply to modules soldered directly to a 100–mm × 100–mm, double-sided PCB with 2 oz.
copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins.
Please refer to the mechanical specification for more information. Applies to Figure 4.
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
TYPICAL CHARACTERISTICS (continued)
PTB48560A Characteristic Data (VO = 5 V)
(3) (4)
EFFICIENCY
vs
OUTPUT CURRENT
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
100
VO- Output Voltage Ripple - mVPP
100
90
Efficiency - %
VI = 36 V
80
VI = 48 V
70
VI = 60 V
60
80
VI = 75 V
60
VI = 60 V
VI = 48 V
40
VI = 36 V
20
VI = 75 V
0
50
0
1
2
3
4
5
6
0
1
5
POWER DISSIPATION
vs
OUTPUT CURRENT
TEMPERATURE DERATING
vs
OUTPUT CURRENT
6
90
VI = 75 V
5
80
Ambient Temperature - oC
PD - Power Dissipation - W
4
Figure 6.
6
VI = 60 V
VI = 48 V
4
3
VI = 36 V
2
1
100 LFM
70
200 LFM
60
400 LFM
50
Nat conv
40
30
0
0
1
2
3
4
IO - Output Current - A
Figure 7.
(4)
3
Figure 5.
7
(3)
2
IO - Output Current - A
IO - Output Current - A
5
6
20
0
1
2
3
4
IO - Output Current - A
5
6
Figure 8.
All data listed in Figure 5, Figure 6, and Figure 7 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum
rated operating temperature. Derating limits apply to modules soldered directly to a 100–mm × 100–mm, double-sided PCB with 2 oz.
copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins.
Please refer to the mechanical specification for more information. Applies to Figure 8.
9
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
TYPICAL CHARACTERISTICS (continued)
PTB48560C Characteristic Data (VO = 12 V)
(5) (6)
EFFICIENCY
vs
OUTPUT CURRENT
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
100
VO - Output Voltage Ripple - mVPP
100
VI = 36 V
90
Efficiency - %
VI = 48 V
80
VI = 60 V
70
VI = 75 V
60
VI = 60 V
60
0
0.5
1
1.5
2
VI = 48 V
40
20
VI = 36 V
0
50
VI = 75 V
80
2.5
0
POWER DISSIPATION
vs
OUTPUT CURRENT
TEMPERATURE DERATING
vs
OUTPUT CURRENT
2.5
80
5
VI = 75 V
4
Ambient Temperature - oC
PD - Power Dissipation - W
2
90
VI = 60 V
VI = 48 V
3
2
VI = 36 V
1
100 LFM
200 LFM
70
400 LFM
Nat conv
60
50
40
30
0
0.5
1
1.5
IO - Output Current - A
Figure 11.
10
1.5
Figure 10.
0
(6)
1
Figure 9.
6
(5)
0.5
IO - Output Current - A
IO - Output Current - A
2
2.5
20
0
0.5
1
1.5
2
IO - Output Current - A
2.5
Figure 12.
All data listed in Figure 9, Figure 10, and Figure 11 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum
rated operating temperature. Derating limits apply to modules soldered directly to a 100–mm × 100–mm, double-sided PCB with 2 oz.
copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins.
Please refer to the mechanical specification for more information. Applies to Figure 12.
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
APPLICATION INFORMATION
Operating Features and System Considerations for the PTB48560x DC/DC Converters
Primary-Secondary Isolation
These converters incorporate electrical isolation between the input terminals (primary) and the output terminals
(secondary). All converters are tested to a withstand voltage of 1500 VDC. This complies with UL/cUL 60950 and
EN 60950 and the requirements for functional isolation. It allows the converter to be configured for either a
positive or negative input voltage source. The data sheet Terminal Functions table provides guidance as to the
correct reference that must be used for the external control signals.
Undervoltage Lockout
The undervoltage lockout (UVLO) is designed to prevent the operation of the converter until the input voltage is
close to the minimum operating voltage. The converter is held off when the input voltage is below the UVLO
threshold, and turns on when the input voltage rises above the threshold. This prevents high start-up current
during normal power up of the converter, and minimizes the current drain from the input source during low input
voltage conditions. The converter meets full specifications when the minimum specified input voltage is reached.
The UVLO circuitry also overrides the operation of the PEN and NEN enable controls. Only when the input
voltage is above the UVLO threshold do these inputs become functional.
Soft-Start Power Up
When the converter is first powered, the internal soft-start circuit limits how fast the output voltage can rise. The
soft-start circuit functions whenever the converter output is enabled from the PEN and NEN inputs, or when a
valid input source is first applied with the output enabled. It also functions on a recovery from a load fault,
overtemperature, or input overvoltage condition. The purpose of the soft-start feature is to limit the surge of
current drawn from the input source when the converter begins to operate. By limiting the rate at which the
output voltage rises, the magnitude of current required to charge up the load circuit capacitance is significantly
reduced.
Figure 13 shows the power-up characteristic of a PTB48560C converter. The output voltage is set to 12 V. The
soft-start circuit introduces a short time delay (typically 5-10 ms) before allowing the output to rise. The output
then progressively rises to the voltage set-point. The waveforms were recorded with a resistive load of 2.5 A.
UVLO Threshold
VI (20 V/div)
VO (5 V/div)
II (0.5 A/div)
tdelay
t - Time = 5 ms/div
Figure 13. Soft-Start Waveform
Overcurrent Protection
To protect against load faults, these converters incorporate output overcurrent protection. Applying a load to the
11
PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
www.ti.com
APPLICATION INFORMATION (continued)
output that exceeds the converter overcurrent threshold (see applicable specification) causes the output voltage
to momentarily fold back, and then shut down. Following shutdown, the module periodically attempts to
automatically recover by initiating a soft-start power up. This is often described as a hiccup mode of operation,
whereby the module continues in the cycle of successive shutdown and power up until the load fault is removed.
Once the fault is removed, the converter automatically recovers and returns to normal operation.
Input Overvoltage Protection
The converter protects itself against input voltage surges and transients of up to 100 V. This is above the
maximum continuous operating input voltage of 75 V. In order to protect itself, the converter output is disabled at
some voltage above 75 V. This is to ensure that the converter internal components are not exposed to voltages
above their stress ratings. The converter output remains off for some of the period that the input voltage is above
the maximum continuous rating. Once the overvoltage event has passed, the output from the converter
automatically restarts by executing a soft-start power up.
Differential Output Voltage Sense
A differential remote sense allows a converter regulation circuitry to compensate for limited amounts of IR drop,
that may be incurred between the converter and load, in either the positive or return PCB traces. Connecting the
+Sense and –Sense pins to the respective positive and ground reference of the load terminals improves the load
regulation of the converter output voltage at that connection point. The –Sense pin should always be connected
to the VO COM. The +Sense pin may be connected to either the +VO Bus or +VO Seq outputs.
When the +Sense pin is connected to the VO Seq output, the voltage at VO Bus voltage regulates slightly higher.
Depending on the load conditions on the VO Seq output, the voltage at VO Bus may be up to 100 mV higher than
the converter set-point voltage. In addition, the Smart-Sense feature (incorporated into the converter) only
engages sense compensation to the VO Seq output when that output voltage is close to the set-point. During a
power-up sequencing event, the sense circuit automatically defaults to sensing the VO Bus voltage, internal to
the converter.
Leaving the +Sense and –Sense pins open does not damage the converter or load circuit. The converter
includes default circuitry that keeps the output voltage in regulation. However, if the remote sense feature is not
used, the –Sense pin should still be connected to VOCOM.
Note: The remote sense feature is not designed to compensate for the forward drop of nonlinear or
frequency-dependent components that may be placed in series with the converter output. Examples include
OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the sense pin
connections, they are effectively placed inside the regulation control loop, which can adversely affect the stability
of the converter.
Overtemperature Protection
Overtemperature protection is provided by an internal temperature sensor, which monitors the temperature of the
converter PCB (close to pin 1). If the PCB temperature exceeds a nominal 115°C, the converter shuts down. The
converter then automatically restarts when the sensed temperature falls to approximately 105°C. When operated
outside its recommended thermal derating envelope (see data sheet derating curves), the converter typcially
cycles on and off at intervals from a few seconds to one or two minutes. This is to ensure that the internal
components are not permanently damaged from excessive thermal stress.
Output Voltage Adjustment
An external resistor is required to set the nominal output voltage(s) of the converter to a voltage higher than its
minimum value. The resistor, RSET, must be connected directly between the VO Adjust (pin 8) and –Sense (pin 7)
terminals. A 0.05-W rated resistor can be used. The tolerance should be 1%, with a temperature stability of 100
ppm/°C (or better). Place the resistor close to the converter and connect it using dedicated PCB traces (see
Figure 14). Table 1 gives the nearest standard value of external resistor for the common voltages within each
model's adjust range. The actual output voltage that the resistor value provides is also provided.
12
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
Table 1. Standard Values of RSET for Common Output Voltages
PTB48560A
PTB48560B
PTB48560C
VO (Required)
RSET
VO (Actual)
RSET
VO (Actual)
RSET
VO (Actual)
1.8 V
–
–
Open
1.802 V
–
–
2V
–
–
200 kΩ
2.004 V
–
–
2.5 V
–
–
40.2 kΩ
2.498 V
–
–
3.3 V
–
–
5.36 kΩ
3.300 V
–
–
3.6 V
Open
3.611 V
309 Ω
3.600 V
–
–
5V
14.3 kΩ
5.005 V
–
–
–
–
9V
–
–
–
–
Open
9.015 V
10 V
–
–
–
–
73.2 kΩ
9.993 V
12 V
–
–
–
–
9.09 kΩ
12 V
13.2 V
–
–
–
–
0Ω
13.23 V
For other output voltages, the value of the required adjust resistor may be calculated using Equation 1.
RSET = RO x
VR
- RP
( VO - Vmin)
(1)
Table 2 gives the output voltage adjust range and the required equation constants for the converter model
selected. To calculate the required value of RSET, simply locate the applicable constants and substitute these into
the formula along with the desired output voltage.
Table 2. Adjust Ranges and Equation Constants
Model #
PTB48560A
PTB48560B
VR
1.24 V
1.24 V
PTB48560C
2.5 V
RO
49.91 kΩ
36.55 kΩ
37.27 kΩ
RP
30.1 kΩ
24.9 kΩ
22.1 kΩ
VMIN
3.61 V
1.8 V
9.02 V
VMAX
5.5 V
3.6 V
13.2 V
Track
5
PTB48560A
+VI
1
+VI
+Sense
VOBus
2
PEN
VOAdjust
3
NEN
VOCOM
-VI
4
9
VO
10
8
6
CO
220 mF
RSET
7
-VI
-Sense
Figure 14. Output Voltage Adjustment
13
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
Input Current Limiting
The converter is not internally fused. For safety and overall system protection, the maximum input current to
the converter must be limited. Active or passive current limiting can be used. Passive current limiting can be a
fast-acting fuse. A 125-V fuse, rated no more than 5 A, is recommended. Active current limiting can be
implemented with a current limited Hot-Swap controller.
Thermal Considerations
Airflow may be necessary to ensure that the module can supply the desired load current in environments with
elevated ambient temperatures. The required airflow rate is determined from the safe operating area (SOA). The
SOA is the area beneath the applicable airflow rate curve on the graph of temperature derating vs output current.
(See the Typical Characteristics.) Operating the converter within the SOA limits ensures that all the internal
components are at or below their stated maximum operating temperatures.
Using the On/Off Enable Controls on the PTB48560x Auto-Track Compatible DC/DC Converters
The converter incorporates two output enable controls. PEN (pin 2) is the positive enable input, and NEN (pin 3)
is the negative enable input. Both inputs are electrically referenced to -VI (pin 4) on the primary or input side of
the converter. The enable pins are ideally controlled with an open-collector (or open-drain) discrete transistor.
Each input has an internal pullup resistor to a reference. There is no benefit to adding pullup resistors external to
the module. If they are added, the maximum input voltage for these inputs must be limited to a maximum of 60 V.
Automatic (UVLO) Power Up
Connecting NEN (pin 3) to -VI (pin 4) and leaving PEN (pin 2) open-circuit, configures the converter for automatic
power up. The converter control circuitry incorporates an undervoltage lockout (UVLO) function, which disables
the converter until the minimum specified input voltage is present at ±VI (see the Electrical Characteristics table).
The UVLO circuitry ensures a clean transition during power up and power down, allowing the converter to
tolerate a slow rising input voltage. For most applications, the PEN and NEN enable controls can be configured
for automatic power up.
Positive Output Enable (Negative Inhibit)
To configure the converter for a positive enable function, connect NEN (pin 3) to -VI (pin 4), and apply the system
On/Off control signal to PEN (pin 2). In this configuration, applying less than 0.8 V (with respect to -VI potential)
to pin 2 disables the converter output. Figure 15 gives an example circuit that uses a MOSFET transistor.
+VI
1
2
3
1 = Outputs Off
−VI
Q1
BSS138
4
+VI
DC/DC
Module
PEN
NEN
−VI
Figure 15. Positive Enable Configuration
Negative Output Enable (Positive Inhibit)
To configure the converter for a negative enable function, PEN (pin 2) is left open circuit, and the system On/Off
control signal is applied to NEN (pin 3). A low-level control signal (less than 0.8 V) must then be applied to pin 3
to enable an output from the converter. An example of this configuration is detailed in Figure 16.
14
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
+VI
1
+VI
DC/DC
Module
2
3
Q1
BSS138
PEN
NEN
1 = Outputs On
-VI
4
-VI
Figure 16. Negative Enable Configuration
On/Off Enable Turn-On Time
Once enabled, the converter executes a soft-start power up. The converter exibits a short delay of approximately
7 ms, measured from the transition of the enable signal to the instance the VO Bus output begins to rise. The
output is in regulation within 20 ms.
VOBus (5 V/div)
II (1 A/div)
Q1 VDS (5 V/div)
t − 5 ms/div
Figure 17. Output Enable Power-Up Characteristic
15
PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
www.ti.com
Sequenced Power Up with POL Modules
Overview
The main output from the PTB48560x converters is VOBus. In power sequencing applications, VOBus is used as
the intermediate supply voltage for powering one or more downstream nonisolated power modules that
incorporate Auto-Track™1. The output voltage from Auto-Track compliant modules can be sequenced using a
control input called Track. The Track input directly controls the output of a module from zero to its set-point
voltage. The control is on a volt-for-volt basis, and allows multiple modules to follow a common analog signal
during power-up events.
The Track signal attempts to start rising when the nonisolated modules are first powered from VOBus. However,
for proper sequencing, the voltage must be held at ground potential for at least 20 ms (40 ms for 12-V input
modules) after VOBus is in regulation. This is necessary to allow time for the nonisolated modules to complete
their power-up initialization. The Track pin of each PTB48560x converter has an internal open-drain transistor
that automatically holds the Track signal at ground potential to comply with this requirement.
The PTB48560B (1.8 V to 3.6 V) has a VOSeq output. VOSeq is internally derived from VOBus and regulated to
the same set-point voltage. It has the added feature of being controlled by the Track input. During power up, this
output can sequence with the outputs of the nonisolated modules powered from VOBus.
Auto-Track Features
Figure 18 shows a block diagram of the converter Auto-Track features. The components shaded are only present
in the PTB48560B. During power up, VOBus rises promptly, after the converter is connected to a valid input
source and its output is enabled. VOSeq (PTB48560B) is the Auto-Track compatible output that is controlled by
the voltage presented at the Track terminal. The control is active from 0 V up to a voltage just below the VOBus
output. Between these limits, the voltage at VOSeq follows that at the Track terminal. Once the Track voltage is
at the VOBus voltage, raising it higher has no further effect. The voltage at VOSeq cannot go higher than VOBus,
and if connected to +Sense, it regulates at the set-point voltage.2
The Track input to the PTB48560x series of converters include a pullup resistor (RTRK) to VOBus, and a 1-µF
capacitor (CTRK) to -Sense. These components are standard on all Auto-Track compatible modules. They form
an R–C time constant that cause the Track voltage to rise when the internal MOSFET is turned off. The
unity-gain relationship between VOSeq and the Track input is the same as all other Auto-Track compliant
outputs.3 The VOSeq output also follows a compatible external ramp waveform applied to the Track pin.4, 5 The
internal MOSFET is designed to hold the Track voltage at ground potential for the required period after the
VOBus output is in regulation.
16
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
VOBus
Smart Sense
To
Internal
Error Amplifier
+Sense
VOSeq
R(TRK)
24.9 kW
Track
Supply
Supervisor
20-mS
Delay
C(TRK)
1 mF
VOCom
Note: The shaded functions are only available with the PTB48560B (3.3-V output).
Figure 18. Block Diagram of Auto-Track Features
Notes:
1. Auto-Track compatible modules incorporate a Track input that can take direct control of the output voltage
during power-up transistions. The control relationship is on a volt-for-volt basis and is active between the 0 V
and the module set-point voltage. Once the Track input is above the set-point voltage, the module remains at
its set-point. Connecting the Track input of a number of such modules together allows their outputs to follow
a common control voltage during power up.
2. When +Sense is connected to the VOSeq output of the PTB48560B, the VOSeq output is tightly regulated to
the set-point voltage. In this configuration, the voltage at the VOBus output is up to 100 mV higher.
3. The VOSeq output on the PTB48560B cannot sink load current. This constraint does not allow the module to
coordinate a sequenced power down.
4. The slew rate for the Track input signal must be between 0.1 V/ms and 1 V/ms. Above this range, the VOSeq
output may no longer accurately follow the Track input voltage. A slew rate below this range may thermally
stress the converter. These slew rate limits are automatically met whenever the Track voltage is controlled by
the internal R-C time constant of the modules being sequenced.
5. If an external voltage is used to control the Track terminal, the source current must be limited. A resistance
value of 2.74-kΩ is recommended for this purpose. This is necessary to protect the internal transistor to the
converter. This transistor holds the track control voltage at ground potential for 20 ms after the VOBus output
is in regulation.
17
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
Power-Up Sequencing With A VO SEQ Output (PTB48560B)
Figure 19 shows the PTB48560B converter (U1) providing two 3.3-V sources. This allows it to both power and
sequence with one or more downstream nonisolated modules. The example shows two 3.3-V input PTH03050W
modules (U2 and U3), each rated for up to 6 A of output current. The selection and current rating of the
nonisolated modules depends on the requirements of a specific application. The number of modules, their
respective output voltage, and load current rating combine with the load required at the VOSeq output. The total
must be supplied by the PTB48560B, and cannot exceed that available at the VOBus output.
U1
5
Track
VOSEQ (3.3 V)
PTB48560B
+Sense
+VI
1
+VI
VOSeq
VOBus
2
PEN
3
4
Track
10
3
8
-Sense
6
R1
5.36 kW
VI
PTH03050W
VO
6
Inhibit GND Adjust
4
1
5
C1
47 mF
NEN
-V I
2
U2
11
VOAdjust
VOCOM
-V I
9
R2
2.21 kW
C2
100 mF
V(POL)1 (2.5 V)
C3
100 mF
7
2
U3
Track
3
VI
PTH03050W
VO
6
V(POL)2 (1.8 V)
Inhibit GND Adjust
4
1
5
C4
100 mF
R3
5.49 kW
C5
100 mF
Figure 19. Power-Up Sequencing With Nonisolated POL Modules
The output voltage adjust range of the PTB48560B is 1.8 V to 3.6 V. In these applications, the output voltage
must always be set to 3.3 V (R1 = 5.36 kΩ). This sets the output voltage of both the VOBus and VOSeq outputs.
The output voltage of the 3.3-V input (nonisolated) modules, U2 and U3, can be set to any voltage over the
range, 0.8 V to 2.5 V. In this example, they are set to 2.5 V (R2 = 2.21 kΩ) and 1.8 V (R3 = 5.49 kΩ),
respectively. Figure 20 shows the power-up waveforms from Figure 19 when the Track input to all three modules
are simply connected together.
The converter provides input power to the downstream nonisolated modules via the VOBus output. This output
rises first to allow the nonisolated modules to complete their power-up initialization. The VOSeq (3.3 V), V(POL)1
(2.5 V) and V(POL)2 (1.8 V), outputs supply the load circuit, and rise simultaneously when the converter removes
the internal ground signal to its own Track input. The VOSeq output rises with the outputs from the nonisolated
modules, until it reaches its set-point voltage.
18
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
VOBus (1 V/div)
VOSeq (1 V/div)
V(POL)1 (1 V/div)
V(POL)2 (1 V/div)
td = 20 ms
t − 20 ms/div
Figure 20. Power-Up Waveforms with POL Modules
Power-Up Sequencing Without A VOSEQ Output (PTB48560A/C)
Although the PTB48560A or PTB48560C do not have a VOSeq output, they can provide the input power and
coordinate the power-up sequencing to two or more nonisolated, Auto-Track compliant power modules. Figure 21
shows the PTB48560A (5 V) converter (U1) configured to provide both the input source and the power-up
sequence timing to two 5-V input nonisolated modules. The example shows two PTH05050W modules (U2 and
U3), each rated for up to 6 A of output current. In this case, the number of downstream modules, and their
respective output voltage and load current rating, is only limited by the amount of current available at the VOBus
output.
19
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
U1
5
Track
VOBUS (5 V)
PTB48560A
+Sense
+VI
1
+VI
PEN
VOBus
4
10
-Sense
6
R1
14.3 kW
VI
PTH05050W
VO
6
Inhibit GND Adjust
4
1
5
C1
47 mF
NEN
-V I
3
8
VOAdjust
VOCOM
-V I
2
U2
Track
2
3
9
R2
698 W
C2
100 mF
V(POL)1 (3.3 V)
C3
100 mF
7
2
U3
Track
3
VI
PTH05050W
VO
6
V(POL)2 (1.5 V)
Inhibit GND Adjust
4
1
5
C4
100 mF
R3
8.87 kW
C5
100 mF
Figure 21. Power-Up Sequencing With Nonisolated POL Modules
The output voltage of the PTB48560 must be set to a valid intermediate supply voltage. This depends on the
input voltage requirements of the downstream modules. For 5-V input modules, the PTB48560A is selected and
adjusted for an output of 5 V. For 12-V input modules, the PTB48560C is used and adjusted for an output of
12 V. U2 and U3, can be set to any voltage over their applicable adjustment range. In this example, they are set
to 3.3 V (R2 = 698 Ω) and 1.5 V (R3 = 8.87 kΩ), respectively. Figure 22 shows the power-up waveforms from
Figure 21 when the Track control of all three modules are simply connected together.
The PTB48560 converter (U1) provides the required intermediate voltage from the VOBus output to power the
downstream modules, while holding the common Track control at ground potential. After allowing times for U2
and U3 to initialize, U1 removes the ground from the Track control, allowing this voltage to rise. The outputs from
the two nonisolated modules then rise simultaneously to their respective set-point voltages.
20
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
VOBus (1 V/div)
V(POL)1 (1 V/div)
V(POL)2 (1 V/div)
td = 20 ms
t − 10 ms/div
Figure 22. Power-Up Waveform
21
PTB48560A, PTB48560B
PTB48560C
www.ti.com
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
Stand-Alone Operation
The wide output voltage adjust range makes either model of the PTB48560 series of converters an attractive
product as a stand-alone dc/dc converter. In these applications, it is not required to power up or sequence with
any nonisolated POL modules. The output voltage can be adjusted to any value within the applicable adjust
range. The Auto-Track features are simply not used.
Figure 23 shows the recommended configuration when these converters are used as a stand-alone regulator.
The main output (VO Bus) can be used to supply the load directly. Both the Track pin and the VO Seq output
(PTB48560B) are simply left open circuit. The +Sense pin should be connected to the VO Bus output for
improved load regulation.
When the converter is operated in this mode, the output from VO Bus rises promptly on power up.
Track
5
PTB48560x
+Sense
+VI
1
2
3
−VI
4
+VI
PEN
VOSeq
VOBus
VOAdjust
9
11
10
8
NEN
RSet
VOCOM
−VI
C1
220 mF
−Sense
6
7
Figure 23. Stand-Alone Configuration
22
L
O
A
D
PACKAGE OPTION ADDENDUM
www.ti.com
26-Jan-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
(4/5)
(6)
PTB48560AAH
NRND
ThroughHole Module
ERW
11
12
RoHS (In Work)
& non-Green
SN
N / A for Pkg Type
-40 to 85
PTB48560AAS
NRND
Surface
Mount Module
ERY
11
12
Non-RoHS
& non-Green
SNPB
Level-1-235C-UNLIM/
Level-3-260C-168HRS
-40 to 85
PTB48560AAZ
NRND
Surface
Mount Module
ERY
11
12
RoHS (In Work)
& non-Green
SNAGCU
Level-3-260C-168 HR
-40 to 85
PTB48560BAH
NRND
ThroughHole Module
ERW
11
12
RoHS (In Work)
& non-Green
SN
N / A for Pkg Type
-40 to 85
PTB48560BAS
NRND
Surface
Mount Module
ERY
11
12
Non-RoHS
& non-Green
SNPB
Level-1-235C-UNLIM/
Level-3-260C-168HRS
-40 to 85
PTB48560BAZ
NRND
Surface
Mount Module
ERY
11
12
RoHS (In Work)
& non-Green
SNAGCU
Level-3-260C-168 HR
-40 to 85
PTB48560CAH
NRND
ThroughHole Module
ERW
11
12
RoHS (In Work)
& non-Green
SN
N / A for Pkg Type
-40 to 85
PTB48560CAS
NRND
Surface
Mount Module
ERY
11
12
Non-RoHS
& non-Green
SNPB
Level-1-235C-UNLIM/
Level-3-260C-168HRS
-40 to 85
PTB48560CAZ
NRND
Surface
Mount Module
ERY
11
12
RoHS (In Work)
& non-Green
SNAGCU
Level-3-260C-168 HR
-40 to 85
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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