供应PT6904-S系列普诚科技led驱动ic
| 价 格： | 5.20 | |
| 型号/规格： | PT6904-S | |
| 品牌/商标： | PTC |
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.
APPLICATIONS
• LED backlight
• Automotive LED lighting
• Other DC/DC LED drivers
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
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
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- 联系人： 王先生
- 电话：0755-61522172
- 传真：0755-61522171
- 手机：13510620050
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供应PT6903-S系列普诚科技led驱动ic
信息内容：DESCRIPTION PT6903 is a PFM high brightness LED driver control IC. It allows efficient operation of driver current up to 1.0Aoutput, and the input range is from 7V to 36V. Moreover, PT6903 controls the internal MOS at a modulated switchfrequency 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 curr...
供应PT6911-S系列普诚科技LED驱动芯片
信息内容：DESCRIPTION The PT6911 is ideally suited for AC/DC buck LED drivers. Since the PT6911 includes a 12V~450V linear regulator which allows it to work from a wide range of input voltages without the need for an external low voltage supply. Besides, the PT6911 operates in hysteretic control mode, the controller achieves good output current regulation without the need for any loop compensation. The PT6911 delivers constant current within high accuracy to a wide variety and number of series connected LEDs. The PT6911 includes PWM dimming and linear dimming functions. The PWM dimming input can accept an external control signal with a duty cycle of 0~100% and a frequency between 100Hz and a few KHz. Output current to LED string can be programmed to any value between 0 to its maximum value by PWM dimming. Also, a 0.1~1.2V linear dimming input can be used for linear dimming of the LED current. FEATURES• 12V to 450V input range• Hysteretic controller• High accuracy out...
