cf8140a Seiko NPC Corp., cf8140a Datasheet - Page 3

• Manufacturer Part Number: cf8140a
• Description: El Driver Ic
• Manufacturer: Seiko NPC Corp.

BLOCK DIAGRAM
PIN DESCRIPTION
1. "ip" defines input pin with pull down internal resistor
SSOP
10
11
12
13
14
1
2
3
4
5
6
7
8
9
chip
11
12
13
14
15
16
10
4
1
2
3
5
6
7
8
9
ENA
CPO
CP1
CP2
Pin Name
MONG
VSS1
VSS2
OCL2
OCL1
OCE2
OCE1
OUT2
OUT1
CHV
LDR
ENA
VDD
CPO
CP1
CP2
Enable Circuit
Charge Pump
Circuit
i / o
ip
o
o
o
o
o
o
o
o
o
i
i
i
1
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
SM8140A
for Voltage Booster
Oscillation Circuit
Divider
Level Shifter
Function
Switching Circuit
Oscillasion Circuit
High Voltage
NIPPON PRECISION CIRCUITS—3
for output
Divider