Sanyo VCD-X220, Service Manual

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5
U1 BH6575FV (POWER CONTROLLER)
IC BLOCK DIAGRAM & DESCRIPTION
Symbol Description
OUT4+ CH4 positive output
OUT3- CH3 negative output
OUT3+ CH3 positive output
FIL1 CH1 feedback filter terminal
FIL2 CH2 feedback filter terminal
FIL3 CH3 feedback filter terminal
FIL4 CH4 feedback filter terminal
PGND1 power unit power supply ground terminal 1
OUT4- CH4 negative output
Pin
12
13
14
15
16
17
18
19
20
Symbol Description
SPRT short-circuit protection setting terminal
SOFT soft-start setting terminal
CT Triangular wave output terminal
PVCC H-bridge power supply input terminal
OUT2- CH2 negative output
OUT2+ CH2 positive output
OUT1- CH1 negative output
OUT1+ CH1 positive output
PGND2 power unit power supply ground terminal 2
Pin
21
22
23
24
25
26
27
28
29
START 1 DC/DC converter starting terminal
OFF 2 DC/DC converter OFF terminal
CLK 3 External clock synchronization input terminal
MUTE34 4 CH3,4 mute terminal
MUTE1 5 CH1 mute terminal
RESET 6 Reset output terminal
IN1 7 CH1 input terminal
IN2 8 CH2 input terminal
IN3 9 CH3 input terminal
IN4 10 CH4 input terminal
VREF 11 Reference power supply input terminal
DC_IN 30 AC adapter power supply input terminal
REGB 31 Tr driving terminal for regulator
REGO 32 Battery power supply input erminal
GND 33 Pre-unit power supply input erminal
PGND3 34 power unit power supply input erminal 3
LG 35 Drive coil for boosting VG terminal
VG 36 Drive the power-mos circuit power supply input terminal
SW 37 Booster transistor drive terminal
VSYS 38 Control circuit power supply input terminal
EI 39 DC/DC converter error amplifier input terminal
EO 40 DC/DC converter error amplifier output terminal