CALLM FA5301BP, FA5301BN Datasheet
FA5301BP(N)
1
FA5301BP(N)
■ Description
The FA5301BP(N) is a bipolar IC containing basic circuits
necessary for PWM-type switching power supply control.
This IC switches an external transistor according to external
synchronizing pulses.
■ Features
• External synchronization input terminal
• Wide supply voltage range (V
CC =7 to 22V)
• Open-collector output
• Soft-start from standby mode
• Double protection of output transistor by overcurrent limiting
and cutoff functions
• Output ON/OFF control function
• Not many external discrete components needed
■ Applications
• Switching power supply for general equipment
(Optimum for TV, display, and other monitor devices)
■ Dimensions, mm
Á SOP-16
Á DIP-16
■ Block diagram
1
16
9
8
19.4
6.5
7.6
3.4
4.3max
1.5
0.81
3.1min
0.2min
0~15˚
0~15˚
0.5
±0.1
2.54
±0.25
0.3
+0.1
–0.05
Bipolar IC
For Switching Power Supply Control
1
8
9
16
0.65
0.33
0~8˚
1.27
±0.2
6.0
±0.2
3.9
±0.1
1.65
±0.1
0.18
±0.07
0.42
±0.07
9.9
±0.1
0.2
Pin Pin Description
No. symbol
1 IN (–) Inverting input to error amplifier
2 IN (+) Non-inverting input to error
amplifier
3 ER.OUT Error amplifier output
4 FB Feedback input
5 IS Overcurrent detection
6 CD Overcurrent cutoff delay
capacitor
7 GND Ground
8 ON/OFF Output ON/OFF control
9 OUT Output
10 DT Dead time adjustment
11 CT Oscillator timing capacitor
12 CSY External synchronizing signal
detection capacitor
13 SYNC External synchronization input
14 CSO PWM soft-start capacitor
15 REF Reference voltage output (5V)
16 VCC Power supply
FA5301BP(N)
2
■ Absolute maximum ratings
Item Symbol Rating Unit
VCC 22 V
VO 22 V
IOM 5mA
VI 5V
VIS 20 V
VFB 20 V
VON/OFF 6V
VSYNC 6V
Pd 1000 (DIP-16) *
1
mW
400 (SOP-16) *
2
Topr –20 to +85 °C
Tstg –40 to +150 °C
Supply voltage
Output voltage
Error amplifier output
current
Error amplifier input
voltage
Overcurrent detection
terminal input voltage
Feedback terminal input voltage
Output ON/OFF terminal
input voltage
Synchronizing terminal
input voltage
Total power dissipation
Operating temperature
Storage temperature
Notes:
*
1 Derating factor Ta > 25°C : 10.0mW/°C (on PC board)
*
2 Derating factor Ta > 25°C : 4.0mW/°C (on PC board)
■ Recommended operating conditions
Item Symbol Min. Max. Unit
Supply voltage VCC 720 V
Error amplifier input voltage VI 0 VREF-2 V
Output current IO 20 mA
Error amplifier feedback resistor
RNF 33 kΩ
Oscillator timing capacitor CT 100 10,000 pF
Oscillator timing resistor RT 8.2 220 kΩ
Free run oscillation frequency fOSC 1 200 kHz
Synchronized frequency fSYNC 1 200 kHz
Frequency ratio CSY=OV –35 –5 %
fOSC – fSYNC *
3
fSYNC
–30 +10 %
CSY:
Capacitor
is connected
to GND
*
3 Consider the tolerance of
fosc – f
SYNC
fSYNC
■ Electrical characteristics (Ta = 25°C, VCC = 9V, RT = 47kΩ, CT = 1000pF)
Reference voltage section
Item Symbol Test condition Min. Typ. Max. Unit
Output voltage VREF IOR = 1mA 4.75 5.00 5.25 V
Line regulation LINE VCC = 8 to 20V 10 25 mV
Load current regulation LOAD IOR = 0.1 to 2mA 10 25 mV
Output voltage variation by temperature fluctuation VTC1 Ta = –20 to +25°C1%
VTC2 Ta = +25 to +85°C1%
Output current at output short-circuit IOS 25 mA
Oscillator section
Item Symbol Test condition Min. Typ. Max. Unit
Oscillation frequency fOSC CT = 1,000pF, RT = 47kΩ 20 21 22 kHz
Frequency variation by line voltage fluctuation fdV VCC = 8 to 20V 2 %
Frequency variation by temperature fluctuation fdt1 Ta = +25 to –20°C–2 +2%
fdt2 Ta = +25 to +85°C–2 +2%
Input current to synchronizing signal terminal ISYNC1 VSYNC = 1V 300 600
µ
A
ISYNC2 VSYNC = –0.5V –60 –300
µ
A
Input current to synchronizing signal detection terminal ICSY1 Pin 12 = 0V, VSYNC = –0.5V –65 –130 –260
µ
A
ICSY2 Pin 12 = 1V, VSYNC = 1V 200 400
µ
A
Threshold voltage of synchronizing signal detection terminal VTH CSY 0.7 1.0 V
Error amplifier section
Item Symbol Test condition Min. Typ. Max. Unit
Input offset voltage VIO –10 10 mV
Input bias current II 1
µ
A
Common-mode input voltage VCM 0 VREF–2 V
Open-loop voltage gain AV 70 95 dB
Unity-gain bandwidth GB 0.8 MHz
Common-mode signal rejection ratio CMRR 80 dB
Maximum output voltage VOM+ IOM = –50µA4V
VOM– IOM = 50
µ
A 0.5 V
Output sink current IOM– VOM = 1V 170 240
µ
A
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