NPC CF8141B Datasheet
SM8141
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The SM8141 is a transformer-less electroluminescent (EL) sheet lamp driver , capable of dri ving sheets
up to 50cm
2
in size. It employs built-in high withstand voltage output MOS transistors and requires
few external components, making it ideal for compact driver units in portable equipment.
FEATURES
■
Dedicated EL driver
■
■
■
■
■
■
2
50cm
maximum EL sheet drive capability
Noise-less smooth drive waveform
Two oscillators (EL and coil)(SM8141A)
Stand-by function (SM8141B)
High-efficiency MOS transistor driver
Dual supply operation possible
(See TYPICAL APPLICATIONS)
■
2.0 to 5.5V supply operation
■
200Vp-p maximum drive voltage
■
250Hz standard drive frequency
■
8-pinVSOP package
■
Chip form
ORDERING INFORMATION
EL Sheet Driver
PINOUT
8pin VSOP (TOP VIEW)
1CHV
2LDR
3VSS
8141A
4OCL 5 OCE
1CHV
2LDR
3VSS
8141B
4OSC 5 ENA
PACKAGE DIMENSIONS
(Unit : mm)
8 OUT1
7 OUT2
6 VDD
8 OUT1
7 OUT2
6 VDD
DEVICE PACKAGE
SM8141AV 8pin VSOP
SM8141BV 8pin VSOP
CF8141A Chip form
CF8141B Chip form
0.575 typ
0.65
3.1 ± 0.3
0.10
4.4 ± 0.2
1.15 ± 0.05
0.1 ± 0.05
0.22 ± 0.1
6.4 ± 0.3
0.12
0 to 10
0.5 ± 0.2
0.1
+
0.15
0.05
−
M
NIPPON PRECISION CIRCUITS—1
PAD DIMENSIONS
(Unit : mm)
6
7
SM8141
(1800,1300)
45
8
Y
(0,0)
NPC
SA8141
12
X
Chip size : 1.80 × 1.30 (mm)
Chip thickness : 300 ( µ m)
Chip base : V
SS
3
PIN DESCRIPTION
• SM8141A
Pin
number
Pad
number
1 6 CH V 635 1150 I High-voltage DC input
2 7 L DR 435 1150 O Booster coil driver output
3 8 V SS 180 420 – Ground
4 1 O CL 18 0 1 80 I Coil driver oscillator (oscillator frequency determined by external variable resistor)
5 2 OC E 1620 180 I EL driver oscillator (oscillator frequency determined by external variable resistor)
6 3 VD D 1620 420 – Supply
7 4 OUT2 1650 1120 O Output 2
8 5 OUT1 1110 1120 O Output 1
Name
Pad dimensions
I / O Function
X (µm) Y (µm)
• SM8141B
Pin
number
Pad
number
1 6 CH V 635 1150 I High-voltage DC input
2 7 L DR 435 1150 O Booster coil driver output
3 8 V SS 180 420 – Ground
4 1 OS C 180 180 I
5 2 E NA 1620 180 I Enable input (built-in pull-down resistor)
6 3 VD D 1620 420 – Supply
7 4 OUT2 1650 1120 O Output 2
8 5 OUT1 1110 1120 O Output 1
Name
Pad dimensions
I / O Function
X (µm) Y (µm)
Coil and EL driver oscillator
(oscillator frequency determined by external vari able resistor)
NIPPON PRECISION CIRCUITS—2
BLOCK DIAGRAM
• SM8141A
SM8141
• SM8141B
VDD
VSS
LDR
Divider
Oscillation Circuit
for Voltage Booster
OCL
CHV
OUT1
High Voltage
Switching Circuit
Divider
Oscillasion Circuit
for output
OCE
OUT2
VDD
VSS
LDR
Divider Divider
CHV
Oscillation Circuit for
boosting voltage and EL drive
OUT1
High Voltage
Switching Circuit
OSC
OUT2
ENA
NIPPON PRECISION CIRCUITS—3
Loading...