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FLS6617
Primary-Side-Regulation PWM with POWER MOSFET
Integrated
Features
Description
Low Standby Power under 30 mW
Green-Mode: Linearly Decreasing PWM Frequency
with Cycle Skipping
This third-generation Primary Side Regulation (PSR)
and highly integrated PWM controller provides several
features to enhance the performance of low-power
®
flyback converters. The proprietary TRUECURRENT
technology of FLS6617 enables precise CC regulation
and simplified circuit design for battery-charger
applications leading to lower-cost, smaller, and lighter
chargers, compared to a conventional design or a linear
transformer.
Fixed PWM Frequency at 50 kHz with Proprietary
Frequency Hopping to Solve EMI Problem
Peak-Current-Mode Control in CV Mode
Available in the 7-Lead SOP Package
High-Voltage Startup
Fewest External Component Counts
Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection with Auto Restart
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15 V
Fixed Over-Temperature Protection with
Auto Restart
To minimize standby power consumption, the
proprietary green mode provides off-time modulation to
linearly decrease PWM frequency under light-load
conditions. Green mode assists the power supply in
meeting power conservation requirements.
By using the FLS6617, a charger can be implemented
with few external components and minimized cost. A
typical output CV/CC characteristic envelope is shown
in Figure 1.
VO
Applications
Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools, etc.
Replaces linear transformers and RCC SMPS
±7%
IO
Related Resources
Fairchild Power Supply WebDesigner — Flyback
Design & Simulation - In Minutes at No Expense
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
Operating
Temperature Range
Package
Packing
Method
FLS6617MX
-40°C to +125°C
7-Lead, Small Outline Package (SOP-7)
Tape & Reel
© 2015 Fairchild Semiconductor Corporation
FLS6617 • Rev. 1.1
www.fairchildsemi.com
FLS6617 — Primary-Side-Regulation PWM with POWER MOSFET Integrated
May 2016
Csn2
Rsn
L1
T1
Rsn2
D1
DF
Csn
D4
CO1
RF
Rsn1
AC
Input
C1
Rd
DC
Output
Dsn
C2
DFa
D2
CO2
R1
CVDD
D3
CVS
R2
VS 5
2 VDD
7 HV
DRAIN
3 GND
8
1
CS
NC 4
RSENSE
FLS6617
Figure 2. Typical Application
Internal Block Diagram
Drain
HV
8
7
Auto
Recovery
OTP
24V
S
PWM
Soft
Driver
Q
R
OSC
VRESET
VDD
2
Max.
Duty
…
0.8V
16V/5V
Pattern
Generator
LEB
1
CS
5
VS
VRESET
Peak Detect
Vcs,pk
S
EA_I
NC
Slope
Compensation
4
Constant Current
Regulation
TS
2.5V
Vsah
EA_V
Tdis
Sample and
Hold
Vsah= Output voltage feedback signal
Constant Voltage
Regulation
2.5V
Figure 3. Functional Block Diagram
© 2015 Fairchild Semiconductor Corporation
FLS6617 • Rev. 1.1
www.fairchildsemi.com
2
FLS6617 — Primary-Side-Regulation PWM with POWER MOSFET Integrated
Application Diagram
F: Fairchild Logo
Z: Plant Code
X: 1-Digit Year Code
Y: 1-Digit Week Code
TT: 2-Digit Die Run Code
T: Package Type (M=SOP)
M: Manufacture Flow Code
ZXYTT
6617
TM
Figure 4. Top Mark
Pin Configuration
CS 1
8 DRAIN
VDD 2
7 HV
GND 3
NC 4
5 VS
Figure 5. Pin Configuration
Pin Definitions
Pin #
Name
Description
1
CS
2
VDD
Power Supply. IC operating current and MOSFET driving current are supplied through this pin.
This pin is connected to an external VDD capacitor of typically 10 µF. The threshold voltages for
startup and turn-off are 16 V and 5 V, respectively. The operating current is lower than 5 mA.
3
GND
Ground
4
NC
No Connection
5
VS
Voltage Sense. This pin detects the output voltage information and discharge time based on
voltage of auxiliary winding.
7
HV
High Voltage. This pin connects to bulk capacitor for high-voltage startup.
8
DRAIN
Current Sense. This pin connects to current-sense resistor. Detect the MOSFET current for
peak-current-mode control in CV mode and provide the output-current regulation in CC mode.
Driver Output. Power MOSFET drain. This pin is the high-voltage power MOSFET drain.
© 2015 Fairchild Semiconductor Corporation
FLS6617 • Rev. 1.1
www.fairchildsemi.com
3
FLS6617 — Primary-Side-Regulation PWM with POWER MOSFET Integrated
Marking Information
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
VHV
Parameter
Min.
HV Pin Input Voltage
(1,2)
Max.
Units
500
V
30
V
VVDD
DC Supply Voltage
VVS
VS Pin Input Voltage
-0.3
6.0
V
VCS
CS Pin Input Voltage
-0.3
6.0
V
VCOMV
Voltage Error Amplifier Output Voltage
-0.3
6.0
V
VCOMI
Current Error Amplifier Output Voltage
-0.3
6.0
V
VDS
Drain-Source Voltage
700
V
TA=25°C
1
A
TA=100°C
0.6
A
ID
Continuous Drain Current
IDM
Pulsed Drain Current
4
A
EAS
Single Pulse Avalanche Energy
50
mJ
IAR
Avalanche Current
1
A
PD
Power Dissipation (TA＜50°C)
660
mW
θJA
Thermal Resistance (Junction-to-Air)
147
°C/W
ΨJT
Thermal Resistance (Junction-to-Case)
11
°C/W
TJ
TSTG
TL
ESD
Operating Junction Temperature
-40
+150
°C
Storage Temperature Range
-55
+150
°C
+260
°C
Lead Temperature (Wave Soldering or IR, 10 Seconds)
Electrostatic
Human Body Model, JEDEC-JESD22_A114
Discharge Capability
Charged Device Model, JEDEC-JESD22_C101
(Except HV Pin)
4.0
kV
2.0
Notes:
1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
2. All voltage values, except differential voltages, are given with respect to the GND pin.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
TA
Parameter
Operating Ambient Temperature
© 2015 Fairchild Semiconductor Corporation
FLS6617 • Rev. 1.1
Min.
Max.
Units
-40
+125
°C
www.fairchildsemi.com
4
FLS6617 — Primary-Side-Regulation PWM with POWER MOSFET Integrated
Absolute Maximum Ratings
Unless otherwise specified, VDD=15 V and TA=25°C.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
VDD Section
VOP
Continuously Operating Voltage
23
V
VDD-ON
Turn-On Threshold Voltage
15
16
17
V
VDD-OFF
Turn-Off Threshold Voltage
4.5
5.0
5.5
V
Operating Current
2.5
5.0
mA
IDD-GREEN
Green-Mode Operating Supply Current
0.95
1.2
mA
VDD-OVP
VDD Over-Voltage-Protection Level (OVP)
tD-VDDOVP
VDD Over-Voltage-Protection Debounce Time
IDD-OP
24
90
200
V
350
µs
50
V
2.0
5.0
mA
0.5
3.0
µA
44
50
56
±1.6
±3.4
±5.2
HV Startup Current Source Section
(3)
VHV-MIN
Minimum Startup Voltage on HV Pin
IHV
Supply Current Drawn from HV Pin
VAC=90 V (VDC=100 V),
VDD=0 V
Leakage Current after Startup
HV=500 V,
VDD=VDD-OFF+1 V
IHV-LC
1
Oscillator Section
Center Frequency
Normal Frequency 1
Frequency Hopping
Range
fOSC
Center Frequency
Normal Frequency 2
VF-JUM-53
VF-JUM-35
Frequency Jumping Point
fOSC-N-MIN
Minimum Frequency at No-Load
Minimum Frequency at CCM
VS-F-SKIPH
VS-F-SKIPL
kHz
36
Frequency Hopping
Range
fOSC-CM-MIN
TSKIP-CV
>Vo*0.78
