SPF5047 Datasheet, PDF (1/15 Pages) Sanken electric – Fault Flag Reporting

V_POS = −65 V, R_DS(ON) = 120 mΩ
4 Series LED Bypass Switches
SPF5047
Data Sheet
Description
The SPF5047 is a bypass switch for the high-
brightness matrix LEDs used in applications such as
automotive headlights. The product includes four series
switches to bypass individual LEDs, whose dimming
systems are externally controlled by a CPU. Each LED
has open and short detections that can send fault flags to
the CPU. Even if one of the four LEDs becomes open,
the open-LED is bypassed by its built-in power
MOSFET so that other LEDs can continue to work
normally. The SPF5047 is supplied in a compact,
surface-mount type HSOP package, with an exposed pad
for enhanced thermal dissipation.
Features
● 4 Searis LED Bypass Switches
● Drives Up to 16 LEDs in Series (with 4 ICs; at V_F of
an LED is approx. 3 V)
● Low Noise:
No charge-current-induced noise occrus as each gate
driver uses a negative power souce which requires no
charge-pump circuit.
● High Efficiency:
Optimized trade-offs between switching loss and
switching noise allow highly-accurate control in tr
and tf.
● Fault Flag Reporting
● LED Open Detection
● LED Short Detection
Typical Application
Package
HSOP24
Not to scale
Specifications
● Voltage across LED Capacitos in Series,V_POS:
−65 V (max.)
● Bypass Switch Output Current, I_OUT: 2 A (max.)
● Bypass Switch On-Resistance (at 25 °C), R_DS(ON):
120 mΩ (typ.)
Applications
● Automotive Headlight
● Daylight Running Lamp (DRL)
● High-Brightness Matrix LED System
TEST ₂₄
STATE1 ₂₃
IN1 ₁₇
ROPEN
19
13VCC
ST ATE 2
22
IN2
16
ST ATE 3
21
IN3
15
ST ATE 4
20
IN4
14
GND
18
4 ^POS
6 ^COM1
COM2
8
COM3
10
12 ^NEG
1 ^ISO
SPF5047-DSE Rev.1.1
SANKEN ELECTRIC CO.,LTD.
1
Sep. 07, 2016
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2016