TEA1733LT
GreenChip SMPS control IC
Rev. 8 — 16 July 2013
Product data sheet
1. General description
The TEA1733LT/N1 is a low cost Switched Mode Power Supply (SMPS) controller ICs
intended for flyback topologies. They operate in fixed frequency mode. To reduce
ElectroMagnetic Interference (EMI), frequency jitter has been implemented. Slope
compensation is integrated for Continuous Conduction Mode (CCM) operation.
The TEA1733LT/N1 includes OverPower Protection (OPP). This enables the controller to
operate under overpower situations for a limited amount of time.
Two pins, VINSENSE and PROTECT, are reserved for protection purposes. Input
UnderVoltage Protection (UVP) and OverVoltage Protection (OVP), output OVP and
OverTemperature Protection (OTP) can be implemented using a minimal number of
external components.
At low power levels the primary peak current is set to 25 % of the maximum peak current
and the switching frequency is reduced to limit switching losses. The combination of fixed
frequency operation at high output power and frequency reduction at low output power
provides high-efficiency over the total load range.
The TEA1733LT/N1 enables low cost, highly efficient and reliable supplies for power
requirements up to 75 W to be designed easily and with a minimum number of external
components.
2. Features and benefits
2.1 Features
SMPS controller IC enabling low-cost applications
Large input voltage range (12 V to 30 V)
Very low supply current during start-up and restart (typically 10 A)
Low supply current during normal operation (typically 0.5 mA without load)
Overpower or high/low line compensation
Adjustable overpower time-out
Adjustable overpower restart timer
Fixed switching frequency with frequency jitter to reduce EMI
Frequency reduction with fixed minimum peak current to maintain high-efficiency at
low output power levels
Slope compensation for CCM operation
Low and adjustable OverCurrent Protection (OCP) trip level
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
Adjustable soft start operation
Two protection inputs (e.g. for input UVP and OVP, OTP and output OVP)
IC overtemperature protection
3. Applications
All applications requiring efficient and cost-effective power supply solutions up to
75 W.
4. Ordering information
Table 1.
Ordering information
Type number
TEA1733LT/N1
TEA1733LT
Product data sheet
Package
Name
Description
Version
SO8
plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
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GreenChip SMPS control IC
5. Block diagram
VCCstart
VCC
1
VCCstop
12 V
6V
clamp
8
OTP
restart
5.4 V
DRV
set
OPP switch
δmax
107 μA
S
set
Q
lowvin
VCCstart
power down
lowvin
protlow
R
soft start
OTP
prothigh
protlow
overpower
latch
LEB
S
4
Vctrl(Ipeak)
OCP
stop
latch
OVERPOWER
CORRECTION
VINSENSE
Q
R
ANALOG
CONTROL
latch reset
7
SLOPE
COMPENSATION
prothigh
highvin
Q
BLANK
soft start
MODULATION
7 kΩ
VCCstop
S
restart
55
μA
Vctrl(Ipeak)
restart
stop
δmax
R
OSCILLATOR
frequency reduction
OPTIMER
1.2 V / 4.5 V
power down
3
OPTIMER
2.5 V
OPP switch
TEMPERATURE
PROTECTION
2
RESTART
CONTROL
ISENSE
11 μA
Q
driver
latch reset
5V
latch
clamp
DRIVER
D
400 mV
overpower
22 V
GND
Vctrl(Ipeak)
21 V
CTRL
32
μA
0.50 V/0.80 V
protlow
6
PROTECT
107
μA
highvin
3.52 V
lowvin
0.72 V/0.94 V
5
VINSENSE
DIGITAL CONTROL
001aan641
Fig 1.
Block diagram TEA1733LT/N1
TEA1733LT
Product data sheet
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GreenChip SMPS control IC
6. Pinning information
6.1 Pinning
VCC
1
GND
2
8
OPTIMER
7
CTRL
TEA1733LT
DRIVER
3
6
PROTECT
ISENSE
4
5
VINSENSE
001aan239
Fig 2.
Pinning diagram SOT96-1 (SO8)
6.2 Pin description
Table 2.
TEA1733LT
Product data sheet
Pin description
Symbol
Pin
Description
VCC
1
supply voltage
GND
2
ground
DRIVER
3
gate driver output
ISENSE
4
current sense input
VINSENSE
5
input voltage protection input
PROTECT
6
general purpose protection input
CTRL
7
control input
OPTIMER
8
overpower and restart timer
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GreenChip SMPS control IC
7. Functional description
7.1 General control
The TEA1733LT/N1 contains a flyback circuit controller, a typical configuration of which is
shown in Figure 3.
C1
R1
C2
TEA1733LT
R2
VINSENSE
PROTECT
R3
Θ
R4
CTRL
OPTIMER
Z1
5
4
6
3
7
2
8
1
ISENSE
DRIVER
GND
S1
R5
R10
VCC
R6
C5
C6
C3
C4
R8
R9
R7
Fig 3.
001aan240
Typical configuration
7.2 Start-up and UnderVoltage LockOut (UVLO)
Initially, the capacitor on the VCC pin is charged from the high voltage mains via resistor
R3.
If VCC is lower than Vstartup, the IC current consumption is low (typically 10 A). When VCC
reaches Vstartup, the IC first waits for the VINSENSE pin to reach the Vstart(VINSENSE)
voltage and PROTECT pin to reach the Vdet(L)(PROTECT) voltage. When both levels are
reached, the IC charges the ISENSE pin to the Vstart(soft) level and starts switching. In a
typical application, the supply voltage is taken over by the auxiliary winding of the
transformer.
If a protection is triggered the controller stops switching. Depending on the protection
triggered, the protection causes a restart or latches the converter to an off-state.
A restart caused by a protection rapidly charges the OPTIMER pin to 4.5 V (typical). The
TEA1733LT/N1 enters Power-down mode until the OPTIMER pin discharges down to
1.2 V (typical). In Power-down mode, the IC consumes a very low supply current
(10 A typical) and the VCC pin is clamped at 22 V (typical) by an internal clamp circuit.
When the voltage on pin OPTIMER drops below 1.2 V (typical) and the VCC pin voltage is
above the VCC start-up voltage (See Figure 4), the IC restarts.
When a latched protection is triggered, the TEA1733LT/N1 immediately enters
Power-down mode. The VCC pin is clamped to a voltage just above the latch protection
reset voltage (Vrst(latch) + 1 V).
TEA1733LT
Product data sheet
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GreenChip SMPS control IC
Vstartup
Vth(UVLO)
VCC
soft start
soft start
ISENSE
Vdet(H)(VINSENSE)
VINSENSE
Vdet(H)(PROTECT)
Vdet(L)(PROTECT)
PROTECT
4.5 V
1.2 V
OPTIMER
VO
(power down)
charging VCC
capacitor
starting
converter
normal
operation
protection
restart
014aaa929
Fig 4.
Start-up sequence, normal operation and restart sequence
When the voltage on pin VCC drops below the Vth(UVLO) level during normal operation, the
controller stops switching. The TEA1733LT/N1 enters Restart mode. In Restart mode, the
driver output is disabled and the VCC pin is recharged via resistor R3 to the rectified
mains.
7.3 Supply management
All internal reference voltages are derived from a temperature compensated on-chip band
gap circuit. Internal reference currents are derived from a trimmed and temperature
compensated current reference circuit.
7.4 Input voltage detection (VINSENSE pin)
In a typical application the mains input voltage can be detected by the VINSENSE pin.
Switching will not take place until the voltage on VINSENSE has reached the
Vstart(VINSENSE) voltage (typically 0.94 V).
When the VINSENSE voltage drops below Vdet(L)(VINSENSE) (typically 0.72 V) or exceeds
Vdet(H)(VINSENSE) (typically 3.52 V), the converter stops switching and performs a restart.
If pin VINSENSE is left open or disconnected, the pin is pulled up by the internal 20 nA
(typical) current source to reach the Vdet(H)(VINSENSE) level. This triggers restart protection.
An internal clamp of 5.2 V (typical) protects this pin from overvoltages.
7.5 Protection input (PROTECT PIN)
Pin PROTECT is a general purpose input pin, which can be used to switch off the
converter (latched protection). The converter is stopped when the voltage on this pin is
pulled above Vdet(H)(PROTECT) (typically 0.8 V) or below Vdet(L)(PROTECT) (typically 0.5 V). A
current of 32 A (typical) flows out of the chip when the pin voltage is at the
Vdet(L)(PROTECT) level. A current of 107 A (typical) flows into the chip when the pin voltage
is at the Vdet(H)(PROTECT) level.
TEA1733LT
Product data sheet
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GreenChip SMPS control IC
The PROTECT input can be used to create overvoltage detection and OTP functions.
A small capacitor can be connected to the pin if the protections on this pin are not used.
An internal clamp of 4.1 V (typical) protects this pin from overvoltages.
7.6 Duty cycle control (CTRL pin)
The output power of the converter is regulated by the CTRL pin. This pin is connected to
an internal 5.4 V supply using an internal 7 k resistor.
The CTRL pin voltage sets the peak current which is measured using the ISENSE pin
(see Section 7.10). At a low output power the switching frequency is also reduced (see
Section 7.12). The maximum duty cycle is limited to 72 % (typical).
TEA1733LT/N1 does not trigger any protection when maximum duty cycle is reached.
7.7 Slope compensation (CTRL pin)
A slope compensation circuit is integrated in the IC for CCM. Slope compensation
guarantees stable operation for duty cycles greater than 50 %.
7.8 Overpower timer (OPTIMER pin)
If the OPTIMER pin is connected to capacitor C4 (see Figure 3), a temporary overload
situation is allowed. Vctrl(Ipeak) is set by the CTRL. When Vctrl(Ipeak) is above 400 mV, the
IIO(OPTIMER) current (11 A typical) is sourced from the OPTIMER pin. If the voltage on the
OPTIMER pin reaches the Vprot(OPTIMER) voltage (2.5 V typical) the OverPower Protection
(OPP) is triggered (see Figure 5).
IO
VO
400 mV
VISENSE
Vprot(OPTIMER)
VOPTIMER
high load
normal
load
high load
protection
014aaa930
Fig 5.
Overpower delay
TEA1733LT/N1: when the Vprot(OPTIMER) voltage is reached, it is latched in the off state.
TEA1733LT
Product data sheet
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IO
VO
400 mV
VISENSE
Vprot(OPTIMER)
VOPTIMER
normal
load
high load
high load
protection
014aaa968
Fig 6.
Overpower delay: latched
7.9 Current mode control (ISENSE pin)
Current mode control is used for its good line regulation.
The primary current is sensed by the ISENSE pin across an external resistor R9 (see
Figure 3) and compared with an internal reference voltage. The internal reference voltage
is proportional to the CTRL pin voltage (see Figure 7).
014aaa931
0.6
Vsense(max)
(V)
0.4
frequency
reduction
0.2
0
0
Fig 7.
1
2
3
VCTRL (V)
4
Peak current control using pin ISENSE
Leading edge blanking prevents false triggering due to capacitive discharge when
switching on the external power switch (see Figure 8).
TEA1733LT
Product data sheet
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tleb
Vsense(max)
VISENSE
t
014aaa932
Fig 8.
Leading edge blanking using pin ISENSE
7.10 Overpower or high/low line compensation (VINSENSE and
ISENSE pins)
The overpower compensation function can be used to realize a maximum output power
which is nearly constant over the full input mains.
The overpower compensation circuit measures the input voltage on the VINSENSE pin
and outputs a proportionally dependent current on the ISENSE pin. The DC voltage
across the soft start resistor limits the maximum peak current on the current sense
resistor.
At low output power levels the overpower compensation circuit is switched off
(See Figure 9).
2
1.7
IISENSE
(μA)
0.68
1
2
3
VVINSENSE (V)
4
014aaa933
Fig 9.
Overpower compensation using pins VINSENSE and ISENSE
7.11 Soft start-up (ISENSE pin)
To prevent audible noise during start-up or a restart condition, a soft start is made. Before
the converter starts, the soft start capacitor C6 (see Figure 3) on the ISENSE pin is
charged. When the converter starts switching, the primary peak current slowly increases
as the soft start capacitor discharges through the soft start resistor (R6, see Figure 3).
The soft start time constant is set by the soft start capacitor value chosen. The soft start
resistor value must also be taken into account, but this value is typically defined by the
overpower compensation (see Section 7.10).
TEA1733LT
Product data sheet
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7.12 Low power operation
In low power operation switching losses are reduced by lowering the switching frequency.
The converter switching frequency is reduced and the peak current is set to 25 % of the
maximum peak current (see Figure 7 and Figure 10).
fsw
(kHz)
switching
frequency
1
2
VCTRL (V)
014aaa934
Fig 10. Frequency control
7.13 Driver (DRIVER pin)
The driver circuit to the gate of the power MOSFET has a current sourcing capability of
typically 300 mA and a current sink capability of typically 750 mA. This allows for a fast
turn-on and turn-off of the power MOSFET for efficient operation.
7.14 OverTemperature Protection (OTP)
Integrated overtemperature protection ensures the IC stops switching if the junction
temperature exceeds the thermal temperature shutdown limit.
OTP is a latched protection and it can be reset by removing the voltage on pin VCC.
TEA1733LT
Product data sheet
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8. Limiting values
Table 3.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
supply voltage
continuous
0.4
+30
V
t < 100 ms
-
35
V
Voltages
VCC
VVINSENSE
voltage on pin VINSENSE
current limited
0.4
+5.5
V
VPROTECT
voltage on pin PROTECT
current limited
0.4
+5
V
VCTRL
voltage on pin CTRL
0.4
+5.5
V
VIO(OPTIMER)
input/output voltage on pin
OPTIMER
0.4
+5
V
VISENSE
voltage on pin ISENSE
current limited
0.4
+5
V
ICC
current on pin VCC
< 10 %
-
+0.4
A
II(VINSENSE)
input current on pin
VINSENSE
1
+1
mA
II(PROTECT)
input current on pin
PROTECT
1
+1
mA
ICTRL
current on pin CTRL
3
0
mA
IISENSE
current on pin ISENSE
10
+1
mA
IDRIVER
current on pin DRIVER
< 10 %
0.4
+1
A
Ptot
total power dissipation
Tamb < 75 C
-
0.5
W
Tstg
storage temperature
55
+150
C
Tj
junction temperature
40
+150
C
Currents
General
ESD
VESD
electrostatic discharge
voltage
class 1
human body
model
[1]
-
4000
V
machine model
[2]
-
300
V
-
750
V
charged device
model
[1]
Equivalent to discharging a 100 pF capacitor through a 1.5 k series resistor.
[2]
Equivalent to discharging a 200 pF capacitor through a 0.75 H coil and a 10 resistor.
9. Thermal characteristics
Table 4.
TEA1733LT
Product data sheet
Thermal characteristics
Symbol
Parameter
Rth(j-a)
Rth(j-c)
Conditions
Typ
Unit
thermal resistance from junction to ambient in free air; JEDEC test
board
150
K/W
thermal resistance from junction to case
79
K/W
in free air; JEDEC test
board
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10. Characteristics
Table 5.
Characteristics
Tamb = 25 C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supply voltage management (pin VCC)
Vstartup
start-up voltage
18.6
20.6
22.6
V
Vth(UVLO)
undervoltage lockout
threshold voltage
11.2
12.2
13.2
V
Vclamp(VCC)
clamp voltage on pin VCC
activated during restart
-
Vstartup + 1
-
V
activated during latched
protection
-
Vrst(latch) + 1 -
V
Vstartup Vth(UVLO)
8
9
V
Vhys
hysteresis voltage
10
ICC(startup)
start-up supply current
VCC < Vstartup
5
10
15
A
ICC(oper)
operating supply current
no load on pin DRIVER
0.4
0.5
0.6
mA
Vrst(latch)
latched reset voltage
4
5
6
V
0.89
0.94
0.99
V
0.68
0.72
0.76
V
Vdet(H)(VINSENSE) HIGH-level detection
voltage on pin VINSENSE
3.39
3.52
3.65
V
IO(VINSENSE)
output current on pin
VINSENSE
-
20
-
nA
Vclamp(VINSENSE)
clamp voltage on pin
VINSENSE
-
5.2
-
V
Input voltage sensing (pin VINSENSE)
Vstart(VINSENSE)
start voltage on pin
VINSENSE
detection level
Vdet(L)(VINSENSE)
LOW-level detection voltage
on pin VINSENSE
II(VINSENSE) = 50 A
Protection input (pin PROTECT)
Vdet(L)(PROTECT)
LOW-level detection voltage
on pin PROTECT
0.47
0.50
0.53
V
Vdet(H)(PROTECT)
HIGH-level detection
voltage on pin PROTECT
0.75
0.8
0.85
V
IO(PROTECT)
output current on pin
PROTECT
VPROTECT = Vlow(PROTECT)
34
32
30
A
87
107
127
A
Vclamp(PROTECT)
clamp voltage on pin
PROTECT
II(PROTECT) = 200 A
3.5
4.1
4.7
V
for minimum flyback peak
current
1.5
1.8
2.1
V
for maximum flyback peak
current
3.4
3.9
4.3
V
5
7
9
k
VCTRL = 1.4 V
0.7
0.5
0.3
mA
VCTRL = 3.7 V
0.28
0.2
0.12
mA
VPROTECT = Vhigh(PROTECT)
[1]
Peak current control (pin CTRL)
VCTRL
voltage on pin CTRL
Rint(CTRL)
internal resistance on pin
CTRL
IO(CTRL)
output current on pin CTRL
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Table 5.
Characteristics …continued
Tamb = 25 C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Pulse width modulator
fosc
oscillator frequency
62
66.5
71
kHz
fmod
modulation frequency
210
280
350
Hz
fmod
modulation frequency
variation
3
4
5
kHz
max
maximum duty cycle
68.5
72
79
Vstart(red)f
frequency reduction start
voltage
pin CTRL
1.5
1.8
2.1
V
V(zero)
zero duty cycle voltage
pin CTRL
1.25
1.55
1.85
V
2.4
2.5
2.6
V
no overpower situation
100
150
200
A
overpower situation
12.2
10.7
9.2
A
restart voltage on pin
OPTIMER
low level
0.8
1.2
1.6
V
high level
4.1
4.5
4.9
V
restart current on pin
OPTIMER
charging OPTIMER
capacitor
127
107
87
A
discharging OPTIMER
capacitor
0.1
0
0.1
A
V/t = 50 mV/s;
VVINSENSE = 0.78 V
0.48
0.51
0.54
V
V/t = 200 mV/s;
VVINSENSE = 0.78 V
0.50
0.53
0.56
V
Overpower protection (pin OPTIMER)
Vprot(OPTIMER)
protection voltage on pin
OPTIMER
Iprot(OPTIMER)
protection current on pin
OPTIMER
Restart timer (pin OPTIMER)
Vrestart(OPTIMER)
Irestart(OPTIMER)
Current sense (pin ISENSE)
Vsense(max)
maximum sense voltage
Vth(sense)opp
overpower protection sense
threshold voltage
370
400
430
mV
VISENSE/t
slope compensation voltage V/t = 50 mV/s
on pin ISENSE
17
25
33
mV/s
tleb
leading edge blanking time
250
300
350
ns
VVINSENSE = 1 V;
Vsense(max) > 400 mV
-
0.28
-
A
VVINSENSE=3 V;
Vsense(max) > 400 mV
-
1.7
-
A
Overpower compensation (pin VINSENSE and pin ISENSE)
Iopc(ISENSE)
TEA1733LT
Product data sheet
overpower compensation
current on pin ISENSE
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Table 5.
Characteristics …continued
Tamb = 25 C; VCC = 20 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into
the IC; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Soft start (pin ISENSE)
Istart(soft)
soft start current
Vstart(soft)
soft start voltage
Rstart(soft)
soft start resistance
VCTRL = 4 V; enable
voltage
63
55
47
A
-
Vsense(max)
-
V
12
-
-
k
-
0.3
0.25
A
0.25
0.3
-
A
0.6
0.75
-
A
9
10.5
12
V
130
140
150
C
Driver (pin DRIVER)
Isource(DRIVER)
source current on pin
DRIVER
VDRIVER = 2 V
Isink(DRIVER)
sink current on pin DRIVER VDRIVER = 2 V
VO(DRIVER)max
maximum output voltage on
pin DRIVER
VDRIVER = 10 V
Temperature protection
Tpl(IC)
[1]
IC protection level
temperature
The clamp voltage on the PROTECT pin is lowered when the IC is in power-down (latched or restart protection).
11. Application information
A power supply with the TEA1733LT/N1 is a flyback converter operating in Continuous
conduction mode (See Figure 11).
Capacitor C5 buffers the IC supply voltage, which is powered via resistor R3 at start-up
and via the auxiliary winding during normal operation. Sense resistor R9 converts the
current through the MOSFET S1 into a voltage on pin ISENSE. The value of R9 defines
the maximum primary peak current on MOSFET S1. Resistor R7 reduces the peak
current to capacitor C5.
In the example shown in Figure 11, the PROTECT pin is used for OVP and OTP. The OVP
level is set by diode Z1 to VCC = 25.8 V. The OTP level is set by Negative Temperature
Coefficient (NTC) resistor R4. The VINSENSE pin is used for mains voltage detection and
resistors R1 and R2 set the start voltage to about 80 V (AC). The overpower protection
time is defined by capacitor C4 is set at 60 ms.
The restart time is defined by capacitor C4 and resistor R8 at 0.5 s.
Resistor R6 and capacitor C6 define the soft start time. Resistor R5 prevents the soft start
capacitor C6 from being charged during normal operation caused by negative voltage
spikes across the current sense resistor R9.
Capacitor C3 reduces noise on the CTRL pin.
See the application note for more information (Ref. 1).
TEA1733LT
Product data sheet
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TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
C1
68 μF
R1
10 MΩ
C2
100 nF
R2
82 kΩ
TEA1733LT
VINSENSE
PROTECT
R3
1 MΩ
R4
Θ 200 kΩ
CTRL
OPTIMER
Z1
25 V
C3
1 nF C4
220 nF
5
4
6
3
7
2
8
1
R8
2.2 MΩ
ISENSE
DRIVER
GND
R5
470 Ω
S1
R10
10 Ω
R6
VCC
C5
4.7 μF
22 kΩ
C6
220 nF
R9
0.25 Ω
R7
10 Ω
001aan241
Fig 11. Typical application
TEA1733LT
Product data sheet
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Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
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TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
12. Package outline
SO8: plastic small outline package; 8 leads; body width 3.9 mm
SOT96-1
D
E
A
X
c
y
HE
v M A
Z
5
8
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
4
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
5.0
4.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100
0.014 0.0075
0.20
0.19
0.16
0.15
0.05
0.01
0.01
0.004
0.028
0.012
0.244
0.039 0.028
0.041
0.228
0.016 0.024
θ
8o
o
0
Notes
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT96-1
076E03
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
Fig 12. Package outline SOT96-1 (SO8)
TEA1733LT
Product data sheet
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Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
16 of 21
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
13. References
[1]
TEA1733LT
Product data sheet
AN10868 — GreenChip TEA1733 series fixed frequency flyback controller
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
17 of 21
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
14. Revision history
Table 6.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
TEA1733LT v.8
20130716
Product data sheet
-
TEA1733LT v.7
Modifications:
•
•
Section 11 “Application information” has been updated.
Section 13 “References” has been added.
TEA1733LT v.7
20130409
Product data sheet
-
TEA1733LT v.6
TEA1733LT v.6
20110125
Product data sheet
-
TEA1733T_LT_P v.5
TEA1733T_LT_P v.5
20101119
Product data sheet
-
TEA1733T_LT_P v.4
TEA1733T_LT_P v.4
20100823
Product data sheet
-
TEA1733T_LT_P_LP v.3
TEA1733T_LT_P_LP v.3
20100520
Product data sheet
-
TEA1733T_TEA1733LT v.2
TEA1733T_TEA1733LT v.2
20100326
Product data sheet
-
TEA1733T_TEA1733LT v.1
TEA1733T_TEA1733LT v.1
20091026
Objective data sheet
-
-
TEA1733LT
Product data sheet
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Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
18 of 21
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
15. Legal information
15.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
15.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
15.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
TEA1733LT
Product data sheet
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
19 of 21
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
GreenChip — is a trademark of NXP B.V.
16. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
TEA1733LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 16 July 2013
© NXP B.V. 2013. All rights reserved.
20 of 21
TEA1733LT
NXP Semiconductors
GreenChip SMPS control IC
17. Contents
1
2
2.1
3
4
5
6
6.1
6.2
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
8
9
10
11
12
13
14
15
15.1
15.2
15.3
15.4
16
17
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 5
General control . . . . . . . . . . . . . . . . . . . . . . . . . 5
Start-up and UnderVoltage LockOut (UVLO) . . 5
Supply management. . . . . . . . . . . . . . . . . . . . . 6
Input voltage detection (VINSENSE pin) . . . . . 6
Protection input (PROTECT PIN) . . . . . . . . . . . 6
Duty cycle control (CTRL pin). . . . . . . . . . . . . . 7
Slope compensation (CTRL pin). . . . . . . . . . . . 7
Overpower timer (OPTIMER pin) . . . . . . . . . . . 7
Current mode control (ISENSE pin) . . . . . . . . . 8
Overpower or high/low line compensation
(VINSENSE and ISENSE pins) . . . . . . . . . . . . 9
Soft start-up (ISENSE pin) . . . . . . . . . . . . . . . . 9
Low power operation . . . . . . . . . . . . . . . . . . . 10
Driver (DRIVER pin) . . . . . . . . . . . . . . . . . . . . 10
OverTemperature Protection (OTP) . . . . . . . . 10
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 11
Thermal characteristics . . . . . . . . . . . . . . . . . 11
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 12
Application information. . . . . . . . . . . . . . . . . . 14
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 18
Legal information. . . . . . . . . . . . . . . . . . . . . . . 19
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 19
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Contact information. . . . . . . . . . . . . . . . . . . . . 20
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2013.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 16 July 2013
Document identifier: TEA1733LT
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