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CM9156B-01MR Datasheet(PDF) 7 Page - California Micro Devices Corp |
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CM9156B-01MR Datasheet(HTML) 7 Page - California Micro Devices Corp |
7 / 13 page © 2006 California Micro Devices Corp. All rights reserved. 04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112 l Tel: 408.263.3214 l Fax: 408.263.7846 l www.cmd.com 7 CM9156B PRELIMINARY Pin Descriptions 4.5V LDO Pre- R egulator 1.5x C harge Pump CL K OSC Counter Driver VIN ENA C1P C 1N C2P C 2N VOUT GND 1.0uF 1.0uF 1.0uF 1.0uF 3.0V TO 6.0V CM9156B PIN DESCRIPTIONS LEAD(s) NAME DESCRIPTION 1VOUT The regulated 4.5V output voltage pin. This pin requires a 1.0 μF or larger ceramic capacitor to ground. This pin connects to the anodes of the LEDs. 2C1P This pin is the plus side of charge-pump bucket capacitor C1. Connect a 1.0 μF ceramic capacitor with a voltage rating of 10V or greater between C1N and C1P. 3 VIN Positive supply voltage input pin. This voltage should be between 3.0V and 6V. This pin requires a 1.0 μF or larger ceramic capacitor to ground. 4 CLK Pin for setting switching frequency (see Table 1 on page 6) 5 NC Pin not connected. 6 ENA Enable pin, active high. By applying a PWM signal to this pin, the LED brightness can be controlled. 7C2N This pin is the minus side of charge-pump bucket capacitor C2. Connect a 1.0 μF ceramic capacitor between C2N and C2P. 8 GND Ground pin. 9C1N This pin is the minus side of charge-pump bucket capacitor C1. Connect a 1.0 μF ceramic capacitor between C1N and C1P. 10 C2P This pin is the plus side of charge-pump bucket capacitor C2. Connect a 1.0 μF ceramic capacitor between C2N and C2P. Functional Block Diagram |
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