Sony HCD-HX7 Service Manual - Page 63

SWITCHING POWER BOARD, IC11 CXD9841P POWER CONTROL, Pin No., Pin Name, Description

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HCD-HX3/HX5/HX7 SWITCHING POWER BOARD IC11 CXD9841P (POWER CONTROL) Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin Name VSENSE F/B CT RT GND PROTECT SS VC1 OCP VC2 P-GND VG (L) VB VS VG (H) - VD I/O Description I AC line voltage detection signal input terminal I Feed back signal input terminal for frequency modulation of oscillator I Connected to the external capacitor for oscillator duty/frequency setting I Connected to the external resistor for oscillator frequency setting - Ground terminal I Connected to the external capacitor for determines intermittent operation period when abnormal detection state I Connected to the external capacitor for soft start timing I Power supply terminal for control circuit "L": stop I Over current detection signal and didt protection signal input terminal O Power supply output terminal for driver - Ground terminal for low voltage side driver O Low voltage side driver drive signal output terminal - Not used O Power supply output terminal for high voltage side driver I High voltage side driver reference voltage input terminal O High voltage side driver drive signal output terminal - Not used I Terminal for drain-kick starting When starting, current is supplied directly from the rectification diode to VC1 63

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63
HCD-HX3/HX5/HX7
SWITCHING POWER BOARD
IC11 CXD9841P (POWER CONTROL)
Pin No.
Pin Name
I/O
Description
1
VSENSE
I
AC line voltage detection signal input terminal
2
F/B
I
Feed back signal input terminal for frequency modulation of oscillator
3
CT
I
Connected to the external capacitor for oscillator duty/frequency setting
4
RT
I
Connected to the external resistor for oscillator frequency setting
5
GND
-
Ground terminal
6
PROTECT
I
Connected to the external capacitor for determines intermittent operation period when abnormal
detection state
7
SS
I
Connected to the external capacitor for soft start timing
8
VC1
I
Power supply terminal for control circuit
"L": stop
9
OCP
I
Over current detection signal and didt protection signal input terminal
10
VC2
O
Power supply output terminal for driver
11
P-GND
-
Ground terminal for low voltage side driver
12
VG (L)
O
Low voltage side driver drive signal output terminal
13
-
-
Not used
14
VB
O
Power supply output terminal for high voltage side driver
15
VS
I
High voltage side driver reference voltage input terminal
16
VG (H)
O
High voltage side driver drive signal output terminal
17
-
-
Not used
18
VD
I
Terminal for drain-kick starting
When starting, current is supplied directly from the rectification diode to VC1