CPC9909 Clare, Inc., CPC9909 Datasheet
CPC9909
Available stocks
Related parts for CPC9909
CPC9909 Summary of contents
Page 1
... LED dimming can be implemented by applying a small DC voltage to the LD pin applying a low frequency PWM signal to the PWMD pin. The CPC9909 is available in a standard 8-lead SOIC package and a thermally enhanced 8-lead SOIC package with an exposed thermal pad (EP). Ordering Information Part ...
Page 2
... LED Driver Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 Input Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Current Sense Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.5 Current Sense Blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.6 Enable/Disable Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.7 Minimum Off-Time One-Shot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.8 Inductor Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.9 Gate Output Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.10 Linear Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.11 PWM Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.12 Combination Linear and PWM Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3. Manufacturing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Packaging Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.4 Washing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 R01 www.clare.com CPC9909 2 ...
Page 3
... Linear Dimming. Apply a voltage less than dim the LED(s). CS(high) R Resistor to GND sets the minimum off-time. T Electrical and thermal conductive pad on the bottom of CPC9909NE. Connect this pad to - ground and provide sufficient thermal coupling to remove heat from the package. Unit ° ...
Page 4
... CPC9909 1.4 Recommended Operating Conditions Parameter Input Voltage Range PWMD Frequency Operating Temperature 1.5 Electrical Characteristics Unless otherwise specified, all electrical specifications are provided for T Parameter Input Input Voltage Range Shut-Down Mode Supply Current Regulator Voltage Regulator Output V Current Available DD for External Circuitry ...
Page 5
... PWMD C VDD R T 2.1 Overview The CPC9909 drives the LEDs via a minimum off-time, peak-current-limited, pulse-frequency modulation scheme. This control scheme is inherently stable, and the driver can be operated above a 50% duty cycle without any open-loop instability or sub-harmonic oscillations. Since the switching frequency depends on the LED load current, it results in a high efficiency operation ...
Page 6
... In standby mode, the quiescent current is 0.6mA maximum. 2.7 Minimum Off-Time One-Shot The CPC9909 uses a fixed off-time control scheme. The minimum off-time is set by an external resistor connected between the RT and GND terminals. The off-time can be determined by: ( μ ...
Page 7
... The inductor peak current is given by: I LPeak , S 2.9 Gate Output Drive The CPC9909 uses an internal gate drive circuit to turn on and off an external power MOSFET. The gate driver can drive a variety of MOSFETs. For a typical resistor T off-line application, the total MOSFET gate charge will be less than 25nC ...
Page 8
... GND V DD GATE PWMD 0.1μF 50V www.clare.com value available. Note that applying T LD Monitor R1 402kΩ R2 51kΩ CPC9909 RA1 LD 5.0kΩ PWMD C1 C1 2.2μF 0.1μF 16V 25V HB LEDs 900mA Max ASMT-Mx00 CPC1001N* PWM *Optional Isolation . ...
Page 9
... CPC9909 Recommended PCB Land Pattern 1.55 (0.061) 5.40 (0.213) 0.60 1.27 (0.024) (0.050) Dimensions mm (inches) Recommended PCB Land Pattern 2.40 1.55 (0.09) (0.061) 2.40 5.40 (0 ...
Page 10
... NOTE: Tape dimensions not shown comply with JEDEC Standard EIA-481-2 3.4 Washing Clare does not recommend ultrasonic cleaning of this part. www.clare.com www.clare.com W=12.00 (0.472) P=8.00 (0.315) Dimensions mm (inches RoHS 2002/95/EC Specifications: CPC9909 - R01 © Copyright 2010, Clare, Inc. All rights reserved. Printed in USA. 1/27/10 R01 ...