FA7610 Fuji Electric holdings CO.,Ltd, FA7610 Datasheet

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FA7610

Manufacturer Part Number
FA7610
Description
SMPS Controller
Manufacturer
Fuji Electric holdings CO.,Ltd
Datasheet

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FA7610CP(N)/12CP(N)/17CP(N)
The FA7610CP(N), 7612CP(N) and 7617CP(N) are bipolar
ICs containing basic circuits necessary for PWM-type
switching power supply control.
To minimize the number of external discrete components, the
FA7610CP(N) is provided for a flyback or step-up power-
supply circuit, the FA7612CP(N) for a step-down power-supply
circuit and FA7617CP(N) for a flyback power supply circuit.
FA7610CP(N)
• For flyback transformer-type or step-up power-supply circuit
• Totem-pole predriver
• PWM-type switching power supply control
• Low-voltage operation (V
• Latch-mode short-circuit protection function (no malfunction
• Soft-start function
• Undervoltage lockout function
• One capacitor shared for short circuit protection and for soft-
FA7612CP(N)
• For step-down power-supply circuit
• Open collector output
• PWM-type switching power supply control
• Low-voltage operation (V
• Latch-mode short-circuit protection function (no malfunction
• Soft-start function
• Undervoltage lockout function
• One capacitor shared for short circuit protection and for soft-
FA7617CP(N)
• For flyback transformer-type power-supply circuit (maximum
• Open collector output
• PWM-type switching power supply control
• Low-voltage operation (V
• Latch-mode short-circuit protection function (no malfunction
• Soft-start function
• Undervoltage lockout function
• One capacitor shared for short circuit protection and for soft-
• Battery power supply for portable equipment
(maximum output duty = 64% typical)
by noise)
start to minimize the number of external discrete components
(maximum output duty = up to 100%)
by noise)
start to minimize the number of external discrete components
output duty = 67% typical)
by noise)
start to minimize the number of external discrete components
Description
Features
Applications
CC
CC
CC
= 3.6 to 22V)
= 3.6 to 22V)
= 3.6 to 22V)
SOP-8
DIP-8
Dimensions, mm
FA7610CP(N)/FA7612CP(N)/FA7617CP(N)
2.54
0.4
8
1
8
1
0.1
0.25
9.3
4.9
For Switching Power Supply Control
1.5
1.27
0.5
4
5
4
5
0.2
0.1
7.6
Bipolar IC
1

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FA7610 Summary of contents

Page 1

... The FA7610CP(N), 7612CP(N) and 7617CP(N) are bipolar ICs containing basic circuits necessary for PWM-type switching power supply control. To minimize the number of external discrete components, the FA7610CP(N) is provided for a flyback or step-up power- supply circuit, the FA7612CP(N) for a step-down power-supply circuit and FA7617CP(N) for a flyback power supply circuit. Features FA7610CP(N) • ...

Page 2

... FA7610CP(N)/FA7612CP(N)/FA7617CP(N) Block diagram FA7610CP(N) FA7612CP(N) FA7617CP(N) 2 Pin Pin Description No. symbol IN (–) 1 Inverting input to error amplifier FB 2 Error amplifier output GND 3 Ground OUT 4 Output VCC 5 Power supply CS 6 Capacitor for soft-start, short-circuit protection and delay CT 7 Oscillator timing capacitor REF 8 Reference voltage output (2 ...

Page 3

... Recommended operating conditions Item Supply voltage Feedback resistance Oscillator timing capacitor Oscillator timing resistance Oscillation frequency Electrical characteristics ( Reference voltage section Common to FA7610C/12C/17C Item Output voltage Line regulation Load regulation Output voltage variation due to temperature change Oscillator section Common to FA7610C/12C/17C Item ...

Page 4

... Input threshold voltage (Pin 6) Input threshold voltage (Pin 6) Short-circuit protection circuit section Common to FA7610C/12C/17C Item Input threshold voltage (Pin 2) Charge current (Pin 6) Latch-mode threshold voltage (Pin 6) Undervoltage lockout circuit section Common to FA7610C/12C/17C Item OFF-to-ON threshold voltage ON-to-OFF threshold voltage Voltage hysteresis Output section Item ...

Page 5

... Characteristic curves ( Oscillation frequency(f ) vs. OSC timing capacitor capacitance Output source current (I ) vs. source supply voltage Supply current(I ) vs. supply voltage(V CC FA7610CP(N)/FA7612CP(N)/FA7617CP(N) Output duty cycle vs. CS terminal voltage(V L-level output voltage SINK ) Error amplifier frequency(f) vs. voltage gain(AV) / phase ( ) vs. output sink current OL 5 ...

Page 6

... FA7610CP(N)/FA7612CP(N)/FA7617CP(N) Application circuit FA7610CP(N) Flyback-transformer type converter circuit FA7612CP(N) Chopper type buck converter circuit 6 ...

Page 7

... VCC and REF terminals in order to prevent from irregular output pulse at start up. Fuji Semiconductor, Inc. - P.O. Box 702708 - Dallas, TX 75370 - 972-733-1700 - www.fujisemiconductor.com 330k 180k 4.7 36k 1000p L.O OSC. + S.C.P + OFF + + + OFF PWM 2.2k 18.75k FA7610CP(N)/FA7612CP(N)/FA7617CP( VCC +5V –5V 7 ...

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