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BD93942F PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD93942F
기능 White LED Driver
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BD93942F 데이터시트, 핀배열, 회로
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
Panels (DCDC Converter type)
BD93942F
General Description
BD93942F is a high efficiency driver for white LEDs and
designed for large LCDs. These ICs are built-in a boost
DCDC converters that employ an array of LEDs as the
light source. BD93942F have some protect function
against fault conditions, such as the over-voltage
protection (OVP), the over current limit protection of
DCDC (OCP), the short circuit protection (SCP), the
open detection of LED string. Therefore BD93942F are
available for the fail-safe design over a wide range
output voltage.
Key Specification
Operating power supply voltage range: 9.0V to 35.0V
LED minimum current
30mA
LED maximum current:
150mA
Oscillator frequency:
150kHz (RT=100k)
Operating Current:
3.7mA (Typ.)
Operating temperature range:
-40°C to +85°C
Features
4ch LED constant current driver and DC/DC converter
Maximum LED Current: 150mA
LED Feedback Voltage: 0.45V (@ILED=150mA)
so lower heat. Adjustable Feed Back Voltage
by following LED Current setting.
2% LED current accuracy (ADIM=2.5V,
when each LED is set to 100mA)
Analog current (Linear) dimming at ADIM pin
LED pin rating 60V
Individual detection and individual LED OFF for both
open and short circuits
Built-in ISET pin short-circuit protection circuit
FET’s Gate (N pin) is driven by 5.8V swing
Built-in Vout discharge circuit for shutdown
Built-in Vout overvoltage protection (OVP) /
reduced voltage protection (SCP) circuit
SOP16 package
Applications
TV, Computer Display, Notebook, LCD Backlighting
Package
SOP16
W(Typ.) x D(Typ.) x H(Max.)
10.00mm x 6.20mm x 1.71mm
Typical Application Circuit
Figure 1. SOP16
VIN
VIN
Inductor
Diode
CIN
FET
PGND
AGND
COUT
REG58
CREG
RN2
RCS DN RN1
ROVP1
ROVP2
RRT
COVP
RFB CFB1
ADIM
RISET
REG58
N
GND
CS
RT
OVP
SSFB
ISET
ADIM
STB
VCC
LED4
LED3
LED2
LED1
PWM
ON/ OFF
RVCC
CVCC
CLED4
CLED3
CLED2
CLED1
PWM
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has not designed protection against radioactive rays
1/26
TSZ02201-0F5F0C100050-1-2
12.Aug.2015 Rev.002




BD93942F pdf, 반도체, 판매, 대치품
BD93942F
Datasheet
Electrical Characteristics (Unless otherwise noted, Ta = 25oC, VCC=24V)
Parameter
Symbol
Min.
Limit
Typ.
[DC/DC Protection Block]
Overvoltage protection detection
voltage
Overvoltage protection detection
hysteresis voltage
Short circuit protection detection
voltage
[LED Driver Block]
VOVP
VOVP_HYS
VSCP
2.7
50
0.04
3.0
100
0.10
LED pin current accuracy 1
dILED1
-2
-
Max.
3.3
200
0.25
2
LED pin current accuracy 2
dILED2
-3.2
-
3.2
LED pin current accuracy 3
dILED3
-4.6
-
4.6
LED pin current accuracy 4
dILED4
-8
-
8
LED pin current accuracy 5
dILED5
LED pin Leakage Current
ILLED
LED open detection voltage
VOPEN
LED short detection voltage
ADIM pin Input Current
VSHORT
ILADIM
[STB Block]
STB pin high-level voltage
STBH
STB pin low-level voltage
STBL
STB pin pull-down resistance
[PWM Block]
RSTB
PWM pin high-level voltage
PWM pin low-level voltage
PWMH
PWML
PWM pin pull-down resistance
RPWM
[Failure Indication Block (Open Drain)]
AUTO Timer
tAUTO
Abnormal Detection Timer
tCP
-3 -
3
-2.5 -
2.5
0.05 0.2 0.285
456
-2.5 -
2.5
2 - 35
-0.3 -
0.8
500
1000
1500
2 - 35
-0.3 - 0.8
180 300 420
- 0.655 -
20
Unit Condition
V OVP=SWEEP UP
mV OVP=SWEEP DOWN
V OVP=SWEEP DOWN
%
ILED=100mA,
(ADIM=2.5V,ISET=75k)
%
ILED=70mA,
(ADIM=1.75V,ISET=75k)
%
ILED=50mA,
(ADIM=1.25V,ISET=75k)
%
ILED=30mA,
(ADIM=0.75V,ISET=75k)
%
ILED=100mA,
(ADIM=7V,ISET=75k)
μA LED=60V
V LED=SWEEP DOWN
V LED=SWEEP UP
μA ADIM=3V
V STB=SWEEP UP
V STB=SWEEP DOWN
kSTB=3.0V
V PWM=SWEEP UP
V PWM= SWEEP DOWN
kPWM=3.0V
sec RT=75k
ms RT=75k
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/26
TSZ02201-0F5F0C100050-1-2
12.Aug.2015 Rev.002

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BD93942F 전자부품, 판매, 대치품
BD93942F
Block Diagram
Datasheet
Figure 6. Block Diagram
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/26
TSZ02201-0F5F0C100050-1-2
12.Aug.2015 Rev.002

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부품번호상세설명 및 기능제조사
BD93942F

White LED Driver

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