IS32BL3556 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY FAULT TOLERANT LED DRIVER

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1 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY DESCRIPTION RECOMMENDED EQUIPMENT The ISBL6 is a white LED driver for backlight applications based on a highly efficient boost controller operating over a wide input voltage range of.7v to 0V. The boost converter can drive up to 8 LED, LED per string, at 0mA. The LED sinks can be paralleled together to achieve even higher LED currents, up to ma. The ISBL6 is available in a thermally enhanced etssop-0 package. It is lead (Pb) free, with 00% matte tin lead frame plating. FEATURES The ISBL6 evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. Input voltage range is.7v to 0V for start/stop, cold crank and load dump requirements Excellent input voltage transient response Sync function to synchronize boost converter switching frequency up to.mhz, allowing operation above the AM band Single resistor primary OVP minimizes VOUT leakage AEC-Q00 qualified (pending) V A DC power supply ABSOLUTE MAXIMUM RATINGS 0 power supply Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. PROCEDURE Caution: Do not turn on the power supply until all connections are completed. ) ) ) ) Short J to connect EN/PWM and V. Connect output (default: 6 led series and parallel). Turn on the power supply (default: VIN =v). Revolve the potentiometer RP you can change FSW from.mhz to 0KHz. (default.mhz). ) QUICK START Figure : Photo of ISBL6 Evaluation Board Revolve the potentiometer RP you can set LED current from 00mA to ma (default 00mA per channel). 6) If you want to adjust the LED current by PWM, you should remove J first, and then apply a PWM single to the EN/PWM pin. Typical PWM dimming frequencies fall between 00Hz and KHz, VH=V. 7) For adjusting the output current, you can apply a signal frequency to pin. The frequency range from 0kHz to MHz, the signal to have duty cycles that are between 0% and 7%. 8) For using synchronize function, an external clock can apply to the SYNC pin. The external frequency fall between khz and. MHz. 9) Any fault condition will turn on D LED. 0) Short JP can disable the input switch MOS protection (short Q). ORDERING INFORMATION Part No. Temperature Range Package ISBL6-ZLA-EB -0 C to + C (Industrial) etssop-0,lead-free Table : Ordering Information For pricing, delivery, and ordering information, please contacts ISSI s analog marketing team at analog@issi.com or (08) Integrated Silicon Solution, Inc. Rev. B, 09//06

2 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY Input DC Voltage J FAULT C uf EN/PWM SYNC D.V C 0uF/6V V FAULTB EN/PWM Frequency C uf R 0K R.7K VCC D R 0.R R 0.R R 0.R Q MMBT906 J J Source R7 00R R6 00R 00K R9 RP 0 RP R 0R C nf R8 0K J Q MOSFET_P U C 0.uF VCC R 0K GATE SENSE VIN FAULTB EN/PWM 7 V R0 00K V R 00K ISET Frequency RP 0 RP L Drain GATE SENSE VIN VCC FAULTB EN/PWM ISET FR/SYNC A SW 0 SW ISBL6 D SS6 OVP 9 LED LED LED LED COMP OVP LED LED LED LED P 6,7,8 R 00K R6(C7) K J J6 C9 0uF/6V LED LED LED LED COMP C6 C0 uf 0pF R 0R C8 70nF LED+ J7 J8 Output Output LED LED LED LED Figure : ISFL6 Application Schematic Integrated Silicon Solution, Inc. Rev. B, 09//06

3 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY BILL OF MATERIALS Name Symbol Description Qty Supplier Part No. LED Driver U Reduced voltage ISSI ISBL6 Diode D Zener,.V, W, SMD ST ZM7A Diode D Red LED, SMD Everlight 9-7/BHC-ZLMRY/T Diode D SCHOTTKY, A, 60V MDD MDD SS6 PFET Q 60V/A, P-Channel MOS ONsemi NTD9-G BJT Q PNP, IC=00mA, ICM=00mA, IBM=00mA, SOT- Philips MMBT906 Inductor L 0uH±0%, IR=7.A Wurth Electronic Potentiometer RP, RP 0K±0%, 0.W Bourns 86P--0 Resistor R, R, R RES, 0.R, /W, ±%, SMD Yageo RC06FR-070RL Resistor R RES, 0R, /8W, ±%, SMD Yageo RC0JR-070RL Resistor R6, R7 RES, 00R, /8W, ±%, SMD Yageo RC0JR-0700RL Resistor R RES, 0R, /8W, ±%, SMD Yageo RC0JR-070RL Resistor R RES,.7K, /8W, ±%, SMD Yageo RC0JR-07K7RL Resistor Resistor R, R8, R R9, R0, R, R RES, 0k, /8W, ±%, SMD Yageo RC0JR-070KL RES, 00k, /8W, ±%, SMD Yageo RC0JR-0700KL Resistor R6(C7) RES, k, /8W, ±%, SMD Yageo RC0JR-07KL Capacitor C CAP, nf, 0V, ±0%, SMD Yageo CC0KKX7R9BB Capacitor C CAP, 0nF, 0V, ±0%, SMD Yageo CC0KKX7R9BB Capacitor C6 CAP, 0pF, 0V, ±0%, SMD Yageo CC0KKX7R9BB Capacitor C8 CAP, 70nF, 0V, ±0%, SMD Yageo CC0KKX7R9BB7 Capacitor C, C, C0 CAP, uf, 0V, ±0%, SMD Yageo CC0KKX7R9BB06 E-Cap C, C9 CAP, 0uF, 6V, ±0%, SMD Panasonic EEE-HA00WR Bill of Materials, refer to Figure above. Integrated Silicon Solution, Inc. Rev. B, 09//06

4 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY 0 0 Figure : Board Component Placement Guide - Top Layer Figure : Board PCB Layout - Top Layer Integrated Silicon Solution, Inc. Rev. B, 09//06

5 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY 0 0 Figure : Board Component Placement Guide - Bottom Layer Figure 6: Board PCB Layout - Bottom Layer Copyright 06 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances Integrated Silicon Solution, Inc. Rev. B, 09//06

6 ISBL6 WIDE INPUT VOLTAGE RANGE, HIGH EFFICIENCY REVISION HISTORY Revision Detail Information Date A Initial release B Change R,R6, change C to 0.uF Integrated Silicon Solution, Inc. 6 Rev. B, 09//06