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RT4531WSC 데이터시트(PDF) 1 Page - Richtek Technology Corporation

부품명 RT4531WSC
상세설명  Dual Channel 10s2p WLED Drivers
PDF  14 Pages
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제조업체  RICHTEK [Richtek Technology Corporation]
홈페이지  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT4531WSC 데이터시트(HTML) 1 Page - Richtek Technology Corporation

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RT4531
®
DS4531-01
July 2016
www.richtek.com
1
©
Copyright
2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Ordering Information
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
Applications
Smart Phones
Probable Instruments
Backlight for Small and Media Form
Factor LCD Display with Single-cell Battery Input
Dual Channel 10s2p WLED Drivers
General Description
The RT4531 is a dual-channel current source with high-
efficiency asynchronous boost converter for backlight
application. The RT4531 has built-in 1.5A/36V power
MOSFET and two high current-matching capability current
sink, so RT4531 can drives up 10s2p white LED. The
RT4531 can allow very low voltage headroom control,
therefore to improve LED strings efficiency effectively.
The RT4531 supports both PWM dimming and 1-wire
digital dimming interface and it can realize 10 bit
brightness code programming.
The RT4531 provides complete protection functions such
as input Under-Voltage Lockout (UVLO), Over-Current
Protection (OCP), Output Over Voltage (OVP) and Over-
Temperature Protection (OTP).
The RT4531 is available in the WL-CSP-9B 1.35x1.35
(BSC) package.
Features
Input Voltage Range : 2.5V to 5.5V
Internal Soft-Start, UVLO, OTP, OCP, OVP
Typical Shutdown Current : < 1
μμμμμA
1MHz Switching Frequency
Drives Up to 10 WLEDs in Two Strings
Independent PWM Dimming and 1-Wire Dimming
Control
PWM Dimming Frequency from 20k to 100kHz
Up to 10 Bit Dimming Resolution
LED Current Accuracy
±±±±± 2% ( > 5mA)
LED Current Matching
±±±±± 2% ( > 5mA)
Built-in IFB1/IFB2 pin OVP, Short Protection, and
Un-Use Detection
RT4531
Package Type
WSC : WL-CSP-9B 1.35x1.35 (BSC)
SW
ISET
GND
RT4531
VIN
EN
L
VIN
IFB1
C3
Enable
C2
R2
2P10S
WLEDs
IFB2
PWM
AGND
R1
C1
PWM Dimming


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