BA9700 Просмотр технического описания (PDF) - ROHM Semiconductor
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BA9700 Datasheet PDF : 7 Pages
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Regulator ICs
BA9700A / BA9700AF / BA9700AFV
VIN
GND
R9
47k
8
SW1
10
C7 1000p
3
R8 10k
2
Q1 2SB1009
330
C6 R7
470µ
RB100A
D1
L1
220µH
VOUT
C4, C5
470µ
×2
2.57V
11
Voltage
Regulator
Triangle
Oscillator
30k
Vref
13
1.29V
30k
R1
33k
ERROR AMP
9
330
R6
6
14
+
R3
R2
C1
6.8k
12
−
7.5k 680p
4
0.047µ
C2
5
PWM COMPARATOR
GND
7
1
C3 1µ
R4 22k
R5 39k
Fig.3 Inverting converter
L1: RCH-875 220K (Sumida Electronics)
VIN
GND
R11
47k
8
SW1
10
2.57V
11
30k
13
1.29V
30k
R1
39k
14
R2
4.7k
R3
7.5k C2
0.047µ
12
C1
680p
4
Voltage
Regulator
Vref
ERROR AMP
+
−
C8 1000p
R1010k
3
2
Triangle
Oscillator
C7
100µ
R9
470
L1
RB100A
22µH
D1
Q1
12V
VOUT
C5, C6
470µ
×2
2SB1009
R8 68
Q2
2SD1380
9
R7
470
GND
R6
6
470
PWM COMPARATOR
5
7
1
C4 1µ
R4 20k
R5 39k
Fig.4 Step-up converter
L1: RCH-875 221K (Sumida Electronics)
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