Sony HCD-MX500i Service Manual page 46

HCD-MX500i/MX550i
– POWER Board –
IC601 MIP2F20MS1SO
VDD 1
CLAMP CIRCUIT
(ILIMIT SETTING)
FB 2
VCL
CL 3 IN
VCL.OUT
ICL.LOW
ILIMIT VARIABLE
CIRCUIT
VCC OVP
+
2.4V –
OVERHEAT
PROTECTION
VCC UV
+
7.2V –
VCC 4
IC904 SI-8001FFEK
ON/OFF
PREG
SOFT
START
OSCILLATOR
COMPARATOR
–
+
ERROR AMP
1
46
CONSTANT
CURRENT
SOURCE
FOR LIGHT LOAD
DETECTION INTERMITTENT
OSCILLATION CONTROL
+
27%
–
22%
GENERATOR
CLOCK
12kHz
MAXDC
S Q
R Q
RESTARTING
TRIGGER
VDD UV
+
5.7V
–
5.0V
REGULATOR
OVERCURRENT
PROTECTION
LATCH
RESET
&
DRIVER
THERMAL
PROTECTION
–
+
+
REFERENCE
VOLTAGE
2 3 4
6.6V
VDD CLAMP
ILIMIT
CIRCUIT
CORRECTION
CIRCUIT
DRAIN CURRENT
AT TURNING ON
R Q BLANKING PULSE
GENERATION CIRCUIT
S Q
5.7V
IC905 SI-3010KFEK
VC 1
VIN 2
GND 3
REF
VOUT 4
ADJ 5
5
8 SOURCE
7 SOURCE
–
+
FOR
DETECT
GATE DRIVER
POWER
MOSFET
5 DRAIN
TSD
–
+