Fuji FA5301BP Bipolar ic for switching power supply control Datasheet

Bipolar IC
For Switching Power Supply Control
FA5301BP(N)
FA5301BP(N)
■ Description
■ Dimensions, mm
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.
Á SOP-16
9
3.9±0.1
6.0±0.2
16
■ Features
0.2
1.27±0.2
0.42±0.07
16
9
6.5
1
8
19.4
1.5
0.2min
3.4
0.81
0.5±0.1
2.54±0.25
+0.1 5
.0
0.3 –0
7.6
0~15
˚
5˚
0~1
Pin
No.
Pin
symbol
Description
1
IN (–)
IN (+)
Inverting input to error amplifier
2
3
ER.OUT
Error amplifier output
4
FB
Feedback input
5
IS
CD
Overcurrent detection
6
7
GND
Ground
8
ON/OFF
Output ON/OFF control
9
OUT
Output
10
Dead time adjustment
11
DT
CT
12
CSY
External synchronizing signal
detection capacitor
13
SYNC
External synchronization input
14
CSO
PWM soft-start capacitor
15
REF
VCC
Reference voltage output (5V)
16
1
0.65
Á DIP-16
• Switching power supply for general equipment
(Optimum for TV, display, and other monitor devices)
■ Block diagram
1.65±0.1
0.33
0~8˚
9.9±0.1
3.1min 4.3max
■ Applications
8
1
0.18±0.07
• External synchronization input terminal
• Wide supply voltage range (VCC =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
Non-inverting input to error
amplifier
Overcurrent cutoff delay
capacitor
Oscillator timing capacitor
Power supply
FA5301BP(N)
■ Absolute maximum ratings
■ Recommended operating conditions
Item
Symbol
Rating
Unit
Item
Supply voltage
VCC
VO
IOM
22
V
Supply voltage
22
V
5
mA
VI
5
V
Output voltage
Error amplifier output
current
Error amplifier input
voltage
Oscillator timing resistor
VIS
20
V
Feedback terminal input voltage
VFB
VON/OFF
20
V
Synchronized frequency
6
V
Frequency ratio
Free run oscillation frequency
Synchronizing terminal
input voltage
VSYNC
6
Total power dissipation
Pd
1000 (DIP-16) *1
400 (SOP-16)
Operating temperature
Storage temperature
Topr
Tstg
V
fOSC – fSYNC * 3
fSYNC
Capacitor
is connected
to GND
mW
*2
–20 to +85
°C
–40 to +150
°C
Min.
Max.
Unit
7
20
V
0
VREF-2
V
20
mA
33
CT
RT
fOSC
fSYNC
CSY=OV
CSY:
Oscillator timing capacitor
Overcurrent detection
terminal input voltage
Output ON/OFF terminal
input voltage
Symbol
VCC
Error amplifier input voltage
VI
Output current
IO
Error amplifier feedback resistor RNF
kΩ
100
10,000
pF
8.2
220
kΩ
1
200
kHz
1
200
kHz
–35
–30
–5
%
+10
%
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)
fosc – fSYNC
* 3 Consider the tolerance of
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
LINE
LOAD
IOR = 1mA
VCC = 8 to 20V
IOR = 0.1 to 2mA
4.75
5.00
5.25
V
VTC1
VTC2
IOS
Ta = –20 to +25°C
Ta = +25 to +85°C
Item
Symbol
Test condition
Min.
Typ.
Oscillation frequency
fOSC
fdV
fdt1
fdt2
ISYNC1
CT = 1,000pF, RT = 47kΩ
VCC = 8 to 20V
Ta = +25 to –20°C
Ta = +25 to +85°C
VSYNC = 1V
20
21
ISYNC2
ICSY1
ICSY2
VTH CSY
VSYNC = –0.5V
Pin 12 = 0V, VSYNC = –0.5V –65
Pin 12 = 1V, VSYNC = 1V
Item
Symbol
Test condition
Input offset voltage
VIO
II
VCM
AV
Line regulation
Load current regulation
Output voltage variation by temperature fluctuation
Output current at output short-circuit
10
25
mV
10
25
mV
1
%
1
%
25
mA
Oscillator section
Frequency variation by line voltage fluctuation
Frequency variation by temperature fluctuation
Input current to synchronizing signal terminal
Input current to synchronizing signal detection terminal
Threshold voltage of synchronizing signal detection terminal
–2
–2
300
Max.
Unit
22
kHz
2
%
+2
%
+2
%
600
µA
–60
–300
µA
–130
–260
µA
200
400
µA
0.7
1.0
V
Error amplifier section
Input bias current
Common-mode input voltage
Open-loop voltage gain
Unity-gain bandwidth
Common-mode signal rejection ratio
Maximum output voltage
Output sink current
GB
CMRR
VOM+
VOM–
IOM–
Min.
Typ.
–10
IOM = –50µA
IOM = 50µA
VOM = 1V
Unit
mV
1
µA
VREF–2 V
0
70
Max.
10
95
dB
0.8
MHz
80
dB
4
V
0.5
170
240
V
µA
2
FA5301BP(N)
PWM comparator section
Item
Symbol
Test condition
Input bias current (Pin 4)
IBFB
VTH0
VTH100
ICSO
VFB = 1V
Item
Symbol
Test condition
Input bias current
Pin 10 = 1V
Input threshold voltage
IBDT
VTH DT0
VTH DT100
Duty cycle = 0%
3.2
Duty cycle = 100%
0.1
Reset saturation voltage
VSAT RS
Pin 10 = –100 µA
0.25
0.8
V
Item
Symbol
Test condition
Typ.
Max.
Unit
Input bias current (Pin 5)
IBIS
VTH IS
VIS = 0.3V
–1
µA
0.6
0.7
V
IO CD
VTH LA
VSAT RS
Pin 6 = 0V, VIS = 1V
–450
–700
µA
Item
Symbol
Test condition
Output leakage current
ILEAK
VOL
ISINK
VO = 22V, output OFF
IO = 10mA
VO = 3V
25
Item
Symbol
Test condition
Input bias current (Pin 8)
IBON
VTH ON
VTH OFF
VHYS
Pin 8 = 0V
Item
Symbol
Test condition
Supply current
ICC LA
ICC AV
RT = 47kΩ, latch mode
RT = 47kΩ, duty cycle = 50%
Input threshold voltage (Pin 4)
Soft-start signal pin input current
Min.
Typ.
Max.
Unit
–2.0
–10.0
µA
Duty cycle = 0%
3.3
V
Duty cycle = 100%
0.2
V
Pin 14 = 3V, VFB = 0V
2.0
10.0
µA
Typ.
Max.
Unit
–0.5
–5
Dead time adjustment circuit section
Min.
µA
V
V
Overcurrent limiting circuit section
Input threshold voltage (Pin 5)
Source current of overcurrent cutoff terminal
Latch-mode threshold voltage
Reset saturation voltage (Pin 6)
Min.
0.5
1.8
2.2
2.6
V
0.75
1.0
V
Typ.
Max.
Unit
10
µA
0.4
0.7
V
40
55
mA
Min.
Typ.
Max.
Unit
–60
–300
µA
OFF→ON
2.13
2.50
2.87
V
ON→OFF
1.96
2.30
2.64
V
Pin 6 = 100 µA, VIS = 0V
Output section
L-level output voltage
Output sink current limit
Min.
Output ON/OFF control circuit section
OFF-to-ON threshold voltage
ON-to-OFF threshold voltage
Voltage hysteresis
0.2
V
Overall device
Operating-state supply current
3
Min.
Typ.
Max.
Unit
8.0
12.0
mA
6.5
9.8
mA
FA5301BP(N)
■ Characteristic curves (Ta = 25°C)
Oscillation frequency (fOSC ) vs. timing
resistor resistance (R T)
Output duty cycle vs. DT terminal voltage (VDT)
1000
500
CT=100pF
fosc [kHz]
100
50
10
470pF
680pF
1000pF
1500pF
2200pF
5
1
7
10
20
50
100
200
500
RT [kΩ]
Output duty cycle vs. FB terminal voltage (VFB)
L-level output voltage vs. output sink current (ISINK)
Supply current (ICC ) vs. supply voltage (VCC)
Error amplifier frequency (f) vs.voltage gain(Av)/ phase (θ)
4
FA5301BP(N)
■ Application circuit
Á Switching power supply (primary current control and insulated output type)
This circuit uses the following functions.
• Horizontal synchronizing function
• Overcurrent limiting function
• Overcurrent cutoff function
• Undervoltage input cutoff function
• Soft-start function
Parts tolerances characteristics are not defined in the circuit design
sample shown above. When designing an actual circuit for a product,
you must determine parts tolerances and characteristics for safe and
economical operation.
5
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