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PDF PT6904 Data sheet ( Hoja de datos )
| Número de pieza | PT6904 | |
| Descripción | High Power LED Driver | |
| Fabricantes | PTC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PT6904 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
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High Power LED Driver
Tel: 886-2-66296288
Fax: 886-2-29174598
URL:http://www.princeton.com.tw
Preliminary
PT6904
DESCRIPTION
PT6904 is a constant-current LED driver IC utilized constant frequency, controls buck, boost or
buck-boost switch converter. In each control mode, PT6904 adopts the inductance current continuous
conduction, peak current control mode and the feedback of the output current. It’s controlled by the
internal transconductance operational amplifier and external adjustable slope compensation, it is able
to gain the high precision output current in closed loop.
The typical functions of PT6904 such as UVLO (Under Voltage Lockout), input current limit, open LED
protection, output short circuit protection, output current precision control, linear dimming, PWM
dimming, etc. In addition, multiple the sync pin of PT6904s or input the same clock signal, these ICs will
operate on the same frequency.
Input voltage of PT6904 is 9V to 36V, the oscillator frequency is 25KHz~350KHz that setting by the
external resistors, and the output PWM signal drive external power NMOS. PWM dimming input can
accept an external control signal with a duty cycle 0~100% and a frequency between 100Hz to a few
KHz.
FEATURES
• >90% Efficiency
• Operating voltage: 9V~36V
• Constant-current driver
• Switch control mode: Buck, Boost, Buck-Boost
• Stable operation frequency
• Slope compensation
• Output current closed loop control
• Input current limit, output over voltage protection, output short-circuit protection
• Linear dimming & PWM dimming
• Synchronization
• Soft start
APPLICATIONS
• LED backlight
• Automotive LED lighting
• Other DC/DC LED drivers
PT6904 PRE1.0
-1-
December, 2007
Free Datasheet http://www.Datasheet4U.com
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet PT6904.PDF ] | |
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