MB39A123 Datasheet, PDF (35/44 Pages) Fujitsu Component Limited. – 6 ch DC/DC Converter IC with Synchronous Rectification

MB39A123
■ I/O EQUIVALENT CIRCUIT
• Reference voltage block
VCC ⁴⁸
ESD
protection
element
1.23 V
+
−
79 kΩ
124 kΩ
GND ¹⁰
• Soft-start block
VREF
(2.0 V)
VCC
CSX
ESD
protection
element
9 VREF
• Control block (CTL, CTL1 to CTL6)
VCC
CTLX
86 kΩ
ESD
protection
element
223 kΩ
GND
• Short-circuit detection block
VREF
(2.0 V)
VCC
2 kΩ
13 CSCP
• Short-circuit detection
comparator block
VCC
100 kΩ
−INS 8
VREF
(2.0 V)
(1 V)
GND
GND
GND
• Triangular wave oscillator block (RT)
VREF
(2.0 V)
VCC
0.64 V +
−
11 RT
• Triangular wave oscillator block (CT)
VCC
VREF
(2.0 V)
CT 12
GND
GND
• Error amplifier block (ch.1 to ch.6)
VCC
VREF
(2.0 V)
−INEX
CSX
FBX
1.0 V (ch.1)
1.23 V (ch.2 to ch.6)
GND
X : Each channel number
(Continued)
35