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奇力VAS1106规格书

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  • 日期: 2017-09-29
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标签: 高压线性恒流IC分段线性调光

奇力调光芯片VAS1106是一款分段恒流、支持可控硅调光;调光吸顶灯、球泡、灯丝灯最佳方案选择;设计极简、无电解、高PF、过EMI;去电源化:LED与IC一起焊在铝基板上,去掉冗杂的电源;模块化:并联IC即可实现更大功率与光通量。高效率LED可控硅调光驱动方案VAS1106:

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Technology 奇 力 科 技 Block Diagram VAS1106 LED1 LED2 LED3 SNS T1 T2 T3 T4 12V M1 M2 M3 Logic Control HV LDO 5V Reference 12V 065V SET1 GND SET2 PIN Description PIN NO Name Description 1 2 3 4 5 6 7 8 GND Ground SET2 Current set for current regulator connect a resistor to GND to set the LED current I LED V SET R SET 2 2 VSET2650mV If the IC temperature rise up to 120C the SET2 voltage will drop to reduce current The SET2 voltage will drop to 350mV 160C Provide a ble......

Technology 奇 力 科 技 Block Diagram VAS1106 LED1 LED2 LED3 SNS T1 T2 T3 T4 1.2V M1 M2 M3 Logic Control HV LDO 5V Reference 1.2V 0.65V SET1 GND SET2 PIN Description PIN NO. Name Description 1 2 3 4 5 6 7 8 GND Ground SET2 Current set for current regulator, connect a resistor to GND to set the LED current. I LED = V SET R SET 2 2 , VSET2=650mV. If the IC temperature rise up to 120°C, the SET2 voltage will drop to reduce current. The SET2 voltage will drop to 350mV @160°C. Provide a bleeder current to ensure proper firing of the triac SET1 dimmer. I Bleeder = V SET + R SET 1 1 R SET , VSET1=500mV. 2 SNS The input voltage sense pin T4 T3 T2 T1 Current regulator outputs. Connect to taps along the LED string EP GND Connect to Ground VAS1106, ver1.2 2 http://www.chip-lead.com Technology 奇 力 科 技 Absolute Maximum Ratings (Note1) Parameters T1~T4 to GND SET1,SET2,SNS,VCC to GND Operating temperature range Junction temperature Storage temperature range ESD human body model VAS1106 Maximum Ratings -0.3V to 500V -0.3V to 6V -40°C to +105°C -40°C to +150°C -65°C to +150°C 2000V Note1: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (Note2) Symbol Parameter Condition VSUP Input voltage range ICC Quiescent current VT1=310V VSET2 IACCU TSD RƟJA SET pin voltage Current accuracy VT1=310V OTP threshold Thermal resistance SOP8-e SPEC Min. Typ. 300 Max. 500 0.627 0.65 0.683 ±5 160 60 Unit V µA V % °C °C/W Note 2: Production testing of the device is performed at 25°C. Functional operation of the device and parameters specified over other temperature range, are guaranteed by design, characterization and process control. VAS1106, ver1.2 3 http://www.chip-lead.com Technology 奇 力 科 技 Typical Performance Characteristics VAS1106 T4 LED current vs. T4 pin voltage LED current vs. Die temperature VAS1106, ver1.2 4 http://www.chip-lead.com Technology 奇 力 科 技 Application Information VAS1106 1. Operating Theory The AC main voltage waveform is a sine-wave, the rectifier bridge transfer the AC voltage to DC voltage, see (B) and (C). Figure (A) show typical triac dimmed voltage waveform. Vin VRB Vsin (A) (B) (C) Voltage Waveforms After Triac Dimming Voltage Waveforms After Triac Dimming With Without Bleeder Circuit Bleeder Circuit In order to emulate an incandescent light bulb with any LED driver, the existing triac will require a small amount of holding RSET1 RSET2 R3 Vin R1 GND SET1 C1 R2 T1 T2 VAS1106 current throughout the AC line cycle. An external resistor (RSET1, RSET2) and internal M0 perform this function. However the external holding current may reduce the circuit efficiency, the external current should be shutdown when the line voltage is high enough. An external series pass regulator (R1, R2, R3) translates the rectified line voltage to a level where can be sensed by the SNS pin on the VAS1106. The SNS pin voltage compare with the threshold voltage of 1.2V to determine whether the external current should be shutdown or not. NM1 is used to delay enable LED driver for preventing LED flash when dimmer just turn on. NM1 T3 T4 SET2 SNS Without triac dimmer the voltage after rectifier bridge is half-wave with 310V peak voltage for 220V AC (155V for 110V AC). The VAS1106 integrated 3 high voltage switches, named M1 to M3, each of their drain and source connect one LED string, named LED1 to LED3. Initially, all the switches are on. If the half-wave voltage is higher than the LED1+LED2 forward voltage, M1 turn off, thus the current VAS1106, ver1.2 5 http://www.chip-lead.com
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