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BL0200C Datasheet Preview

BL0200C Datasheet

High Efficiency

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High Efficiency
For LED Backlight 2ch LED Driver IC
BL0200 Series
General Descriptions
BL0200 series are 2ch output LED driver IC for LED
backlight, and it can do dimming to 0.02 % by external
PWM signal.
This IC realizes a high efficiency by the boost
convertor control that absorbs variability on VF.
The product easily achieves high cost-performance
LED drive system with few external components and
enhanced protection functions.
Package
SOP18
Features and Benefit
Boost convertor
Current-Mode type PWM Control
PWM frequency is 100 kHz o r 200 kHz
Maximum On Duty is 90 %
LED current control
Individual PWM Dimming Control
Analog Dimming
High contrast ratio is 1 / 5000
Accuracy of Reg output voltage is ± 1.5 % or ± 2 %
Protection functions
Enable Function of IC (BL0202B, BL0202C)
Error Signal Output (BL0200C)
Overcurrent Protection for Boost Circuit (OCP)
----------------------------------------------Pulse-by-pulse
Overcurrent Protection for LED Output (LED_OCP)
----------------------------------------------Pulse-by-pulse
Overvoltage Protection (OVP) ----------- Auto restart
Output Open/Short Protection ------------ Auto restart
Thermal Shutdown (TSD)----------------- Auto restart
Not to scale
Lineup
Products
BL0202C
BL0202B
BL0200C
Frequency
200 kHz
100 kHz
VREG
Accuracy
± 1.5 %
Built-in Function
Enable Function of
IC
200 kHz ± 2 % Error Signal Output
Applications
LED backlights
LED lighting etc.
Typical Application Circuit
BL0202B/C
VCC
DRV1
VREF
PWM1
PWM2
OC1
SW1
EN IFB1
DRV2
OC2
REG
COMP1
COMP2
GND
OVP
SW2
IFB2
TC_BL0202_1_R1
BL0200C
VCC
DRV1
VREF
PWM1
PWM2
OC1
SW1
ER IFB1
DRV2
OC2
REG
COMP1
COMP2
GND
OVP
SW2
IFB2
TC_BL0200C_1_R1
BL0200-DS Rev.2.3
May. 15, 2014
SANKEN ELECTRIC CO.,LTD.
1




Sanken

BL0200C Datasheet Preview

BL0200C Datasheet

High Efficiency

No Preview Available !

BL0200 Series
CONTENTS
Lineup ----------------------------------------------------------------------------------------- 1
Applications---------------------------------------------------------------------------------- 1
1. Absolute Maximum Ratings--------------------------------------------------------- 3
2. Electrical characteristics ------------------------------------------------------------- 4
3. Functional Block Diagram----------------------------------------------------------- 6
4. Pin List Table--------------------------------------------------------------------------- 7
5. Typical Application Circuit --------------------------------------------------------- 8
6. Package Diagram ---------------------------------------------------------------------- 9
7. Marking Diagram --------------------------------------------------------------------- 9
8. Functional Description -------------------------------------------------------------- 10
8.1 Startup OperationBL0200C-------------------------------------------- 10
8.2 Startup OperationBL0202B, BL0202C------------------------------ 11
8.3 Constant Current Control Operation ----------------------------------- 12
8.4 PWM Dimming Function -------------------------------------------------- 13
8.5 Gate Drive --------------------------------------------------------------------- 13
8.6 Error Signal Output Function (BL0200C) ----------------------------- 14
8.7 Protection Function --------------------------------------------------------- 14
9. Design Notes --------------------------------------------------------------------------- 18
9.1 Peripheral Components ---------------------------------------------------- 18
9.2 Inductor Design Parameters----------------------------------------------- 18
9.3 PCD Trace Layout and Component Placement ----------------------- 19
10. Reference Design of Power Supply ----------------------------------------------- 21
10.1 BL0202B ----------------------------------------------------------------------- 21
10.2 BL0200C ----------------------------------------------------------------------- 23
OPERATING PRECAUTIONS -------------------------------------------------------- 25
IMPORTANT NOTES ------------------------------------------------------------------- 26
BL0200-DS Rev.2.3
May. 15, 2014
SANKEN ELECTRIC CO.,LTD.
2


Part Number BL0200C
Description High Efficiency
Maker Sanken
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