S6BL111A 2MHz Switching Single Output Buck LED Driver IC0 pages

PRELIMINARY

S6BL111A

2MHz Switching Single Output Buck LED
Driver IC
S6BL111A is a single output Buck LED driver with internal FET. S6BL111A's maximum output current is 1.0A. S6BL111A is designed
to operate as a constant current source regulator. It is suitable for drive of large current LED driver.
A frequency adjust pin allows the user to program the frequency from 205 kHz to 2.1 MHz, it is possible to reduce the external
component size. It is possible to provide stable output current from an automotive cold-crank through load- dump (< 42V) input voltage
conditions.
S6BL111A is AEC-Q100 grade1 qualified.

Features

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100 mV High Side Current-Sense reference

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Adjustable Frequency: 205 kHz to 2.1 MHz:

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High efficiency :
Up to 90% (12V input, 2LED series, 1A)

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Current Mode Architecture with Internal Switching FET

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Internal Bootstrap Diode

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ADJ Pin provides analog dimming

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Small TSSOP-16 pin with exposed PAD
AEC-Q100 grade1 qualified.

Shutdown Current: < 1 µA (max.)

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Thermal Shutdown

Operation Current: 1.4 mA (typ.)

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Cycle-by-Cycle Over Current Limitation

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Constant-Current Regulation : +/-2.0%

Output Under Voltage Detection

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Wide Input Voltage Range: 4.5V to 42V

Programmable Under-voltage Lockout with Hysteresis

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Programmable Open Detect Function Mask Voltage

Diagnosis output

Applications
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Automotive lighting
Beam lights
❐ Daytime running lights
❐ Clearance light
❐ Front and rear fog lights
❐ Rear combination lights
❐ Turn lights
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Block Diagram
VIN

DC Power Supply
4.5V to 42V

S6BL111A :
LED Driver IC

VCC

LDO
OSC

SRCNT

Buck
C-mode
DC/DC

DIM
VCC
VIN

ADJ
VCC

Logic /
PROTECTION

Cypress Semiconductor Corporation
Document Number: 002-02467 Rev. *A

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198 Champion Court

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DIAG

San Jose, C