SM8140A
BLOCK DIAGRAM
(MONG)
OUT1
CHV
LDR
ENA
Enable Circuit
High Voltage
Switching Circuit
CPO
CP1
CP2
Charge Pump
Circuit
Level Shifter
Divider
Divider
Oscillation Circuit
for Voltage Booster
Oscillasion Circuit
for output
VSS1
VSS2
OCE1
PIN DESCRIPTION
SSOP
1
−
2
3
−
4
5
6
7
8
9
10
11
12
13
14
chip
11
12
13
14
4
15
16
1
2
3
5
6
7
8
9
10
Pin Name
CHV
MONG
LDR
VSS1
VSS2
OCL2
OCL1
OCE2
OCE1
ENA
VDD
CPO
CP1
CP2
OUT2
OUT1
i/o
i
o
o
−
−
o
i
i
o
ip
1
−
o
o
o
o
o
DC high voltage pin
Monitor gate
Step
−
up inductor driver output
GND
GND
CR oscillator pin for step
−
up inductor and charge pump.
External resistor at this pin determines oscillator frequency.
CR oscillator pin for output
External resistor at this pin determines oscillator frequency
Output control pin. Output from OUT1 and OUT2 pins are stopped When "L".
Power supply pin
Charge pump output (Voltage output for driving high voltage MOS)
Charge pump external capacitor pin
Charge pump external capacitor pin
Output for EL
Output for EL
Function
1. "ip" defines input pin with pull down internal resistor
OCL2
NIPPON PRECISION CIRCUITS—3
OCE2
OCL1
OUT2
VDD
NPC [ NIPPON PRECISION CIRCUITS INC ]
