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BD93941EFV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD93941EFV
기능 White LED Driver
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BD93941EFV 데이터시트, 핀배열, 회로
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
Panels (DCDC Converter type)
BD93941EFV BD93941FP
General Description
BD93941EFV and BD93941FP 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. BD93941EFV and
BD93941FP 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 BD93941EFV and BD93941FP 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:
200mA
Oscillator frequency:
150kHz (RT=100k)
Operating Current:
4.5mA (Typ.)
Operating temperature range:
-40°C to +85°C
Applications
TV, Computer Display, Notebook, LCD Backlighting
Features
4ch LED constant current driver and DC/DC converter
Maximum LED Current: 200mA
LED Feedback Voltage: 0.37V (@ADIM=2.5V)
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
Set Soft-Start time by external capacitor.
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
HTSSOP-B20 and HSOP20 package with high heat
radiation efficiency
Package
HTSSOP-B20
HSOP20
W(Typ.) x D(Typ.) x H(Max.)
6.50mm x 6.40mm x 1.00mm
14.90mm x 7.80mm x 2.10mm
Figure 1(a). HTSSOP-B20
(BD93941EFV)
Figure 1(b). HSOP20
(BD93941FP)
Typical Application Circuit
VIN
VIN
Inductor
Diode
CIN
FET
PGND
AGND
COUT
REG58
CREG
RN2
RCS DN RN1
ROVP1
ROVP2
RRT
COVP
RFB CFB1
CFB2
CSS
RISET
CAUTO
ADIM
EXPOSED
PAD
REG58
N
DCDC_GND
CS
RT
OVP
FB
SS
ISET
AUTO
ADIM
STB
VCC
LED4
LED3
LED_GND
LED2
LED1
PWM
AGND
ON/OFF
RVCC
CVCC
CLED4
CLED3
CLED2
CLED1
PWM
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has not designed protection against radioactive rays
1/27
TSZ02201-0F1F0C100270-1-2
10.Oct.2013 Rev.001




BD93941EFV pdf, 반도체, 판매, 대치품
BD93941EFV BD93941FP
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
3.00
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
VSHORT
ADIM pin Input Current
ILADIM
[STB Block]
STB pin high-level voltage
STBH
STB pin low-level voltage
STBL
STB pin pull-down resistance
RSTB
[PWM Block]
PWM pin high-level voltage
PWMH
PWM pin low-level voltage
PWML
PWM pin pull-down resistance
RPWM
[Failure Indication Block (Open Drain)]
AUTO pin source current
IAUTO
AUTO pin Detection Voltage
VAUTO
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
-2 -1 -0.5
3.6 4.0 4.4
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
μA AUTO=2V
V AUTO=SWEEP UP
ms RT=75k
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/27
TSZ02201-0F1F0C100270-1-2
10.Oct.2013 Rev.001

4페이지










BD93941EFV 전자부품, 판매, 대치품
BD93941EFV BD93941FP
Block Diagram
VIN CIN
VCC
VCC
CVCC STB
RT
SS
CSS
GND
FB
RFB
CFB
PWM
CREG58
REG58
REGULATOR
UVLO
(VCC)
TSD
SCP
OSDET
OVP
+
OSC
SS
Timer
PWM COMP
+
-
-
Control
Logic
Current
Sense
FILTER
REG58
DRIVER
ERR AMP
-
-
-
-
+
OVP
AUTO
CAUTO
N
CS
DCDC_GND
Current driver
LED1
LED2
LED3
LED4
Datasheet
+
COUT
DC ADIM
ISET
ISET
LED_GND
Open-Short
Detect
LSP(5V fixed)
OSDET
Figure 6. Block Diagram
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/27
TSZ02201-0F1F0C100270-1-2
10.Oct.2013 Rev.001

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BD93941EFV

White LED Driver

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