LMQ62440-Q1
ZHCSM24A –MARCH 2020 –REVISED SEPTEMBER 2020
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8.2 功能方框图
VCC
Clock
VCC
MODE/
SYNC
Detect
MODE
/SYNC
Sync
Oscillator
BIAS
VCC UVLO
OTP
Slope
compensation
LDO
VIN
Over
Temperature
detect
FPWM/Auto
Frequency Foldback
RBOOT
CBOOT
VIN1
System enable
Enable
EN
HS Current
sense
Error
amplifier
VIN
+
+
œ
VIN2
Comp Node
œ
Clock
+
High and
low limiting
circuit
+
Output
low
HS
Current
Limit
œ
SW
System enable
OTP
FB
Drivers and
logic
Soft start
circuit and
bandgap
Hiccup active
VCC UVLO
LS
Current
Limit
œ
AGND
+
Voltage Reference
œ
PGND1
PGND2
+
LS
Current
Min
FPWM/Auto
Vout OV
PGOOD
PGOOD
Logic with
filter and
LS Current
sense
release delay
System enable
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