供应PT6903-S系列普诚科技led驱动ic
| 价 格： | 2.40 | |
| 型号/规格： | PT6903-S | |
| 品牌/商标： | PTC |
DESCRIPTION
PT6903 is a PFM high brightness LED driver control IC. It allows efficient operation of driver current up to 1.0A
output, and the input range is from 7V to 36V. Moreover, PT6903 controls the internal MOS at a modulated switch
frequency up to 800KHz. PT6903 drives a single or multiple series LEDs at a constant-current control method; thus, providing constant current light output and enhanced reliability.
PT6903 has linear and PWM dimming functions. Output current to an LED string can be programmed to any value between its minimum value to its maximum value at the linear dimming control input of PT6903. PT6903 provides a low-frequency PWM dimming input that can accept an external control signal with a duty cycle of 0~100% and a frequency between 100Hz and a few KHz. PT6903 integrates more protection functions. The reliability of LEDs and device can be promoted by these protection functions. PT6903 provides over current protection when output short-circuit or LEDs current rises up about two times setting current. PT6903 must be power-up again if over current protection happens. PT6903 also provides over temperature protection. There are two ways to protect LEDs and device when temperature rises up to limited level. One is internal thermal-shutdown function. If internal temperature rises up about 135℃, PT6903 will turn off switch. It will turn-on again when internal temperature falls down about 115℃. Another is temperature compensation function. This function is only used for SOP8 package. An NTC thermistor temperature monitoring circuit can be used to LD pin. When system temperature rises up to some limited level, the voltage on LD pin will fall under 240mV and LED current will fall under setting value. This function can reduce the temperature of system effectively.
FEATURES
• >90% efficiency
• Wide input voltage range: 7V to 36V
• Constant current driver
• Applications up to 1.0A
• Linear & PWM dimming
• Thermal shutdown protection
• Over current protection
• Internal 40V power NMOS switch
APPLICATIONS
• DC/DC LED driver
• Low voltage industrial LED lighting
• Low voltage halogen replacement LEDs
• Decorative LED lighting
PT6901/PT6903-S/PT6904-S/PT6905/PT6907-S/PT6909-S/PT6910/PT6911-S/PT6937/PT6955/PT6958/PT6959/PT6961/PT6963/PT6964/PT6965/PT6991/PT6992
以上PTC/普诚科技LED驱动全系列IC,长期稳定优势供应！
- 所属城市：广东 深圳
- [联系时请说明来自维库仪器仪表网]
- 联系人： 王先生
- 电话：0755-61522172
- 传真：0755-61522171
- 手机：13510620050
- QQ ：
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