Sony CMT-HX3 Service Manual page 160

HCD-HX3/HX5/HX7
– USB Board –
IC915 R5523N001B-TR-F
GATE
EN 1
CONTROL
UVLO
GND 2
THERMAL
SHUTDOWN
FLG 3
– SUB POWER Board –
IC601 MIP2F20MS1SO
VDD 1
CLAMP CIRCUIT
(ILIMIT SETTING)
FB 2
VCL
27%
CL 3 IN
22%
VCL.OUT
ICL.LOW
ILIMIT VARIABLE
CIRCUIT
VCC OVP
+
2.4V –
OVERHEAT
PROTECTION
VCC UV
+
7.2V –
VCC 4
50
5 OUT
CURRENT
LIMIT
4 IN
FLAG
DELAY
CONSTANT
CURRENT
SOURCE
FOR LIGHT LOAD
DETECTION INTERMITTENT
OSCILLATION CONTROL
+
–
GENERATOR
CLOCK
12kHz
MAXDC
S Q
R Q
RESTARTING
TRIGGER
VDD UV
+
5.7V
–
5.0V
REGULATOR
– USB POWER Board –
IC319 SI-8008TFE
ON/OFF
PREG
SOFT
START
OSCILLATOR
1
6.6V
VDD CLAMP
ILIMIT
CIRCUIT
CORRECTION
CIRCUIT
DRAIN CURRENT
DETECT
AT TURNING ON
R Q BLANKING PULSE
GENERATION CIRCUIT
S Q
5.7V
OVERCURRENT
PROTECTION
LATCH
RESET
&
DRIVER
COMPARATOR
–
THERMAL
PROTECTION
+
–
+
+
ERROR AMP
REFERENCE
VOLTAGE
2
8 SOURCE
7 SOURCE
–
+
FOR
GATE DRIVER
POWER
MOSFET
5 DRAIN
3 4 5