TYPICAL APPLICATION Normal Constant Current Regulator for HV LED TRIAC Dimming Solution for HV LED REF2.1 2 Nov., 2011
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1 DESCRIPTION is a special current regulator to drive HV LED. Compact, few external components design is very flexible in many applications. provides a programmable 10~100mA constant current. Maximum 400V input voltage provides high reliability for HV LED lighting. The simple driving topology will improve power factor, efficiency. EMI issue will be avoided with this linear control. Special design is convenient in high-side application. LED open/short is protected by. The high voltage will be absorbed by itself. LEDs will never face high voltage problem. To improve driving capability, provides a pin to drive external MOSFET. It will be flexible in larger current application. also provide temperature compensation. When internal junction temperature is higher than 135, will decrease the output current linearly. The output current will be zero when junction temperature reaches 150. This protection effectively avoids the flicker problem during abnormal environment temperature. APPLICATIONS GU10, MR16, E11, E17 LED Bulb Compact Size LED Lighting TRIAC Dimming BLOCK DIAGRAM Reference Current Regulator for HV LED FEATURES 5V~400V Operating Voltage 10~100mA Programmable Output Current ±5% Current Accuracy (Target) Less Than 150uA Operating Current Parallel Using for High Current Application Driving External MOSFET for Larger Current LED Short Protection Temperature Compensation When T J >135, output current will be decreased. Output current will be zero when T J=150 Electrical Capacitor Needless High Power Factor High Efficiency Few External Components SOT89-5 Package Tel: Fax: F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
2 TYPICAL APPLICATION Normal Constant Current Regulator for HV LED TRIAC Dimming Solution for HV LED REF2.1 2 Nov., 2011
3 ORDER INFORMATION Valid Part Number Package Type Top Code SOT89-5 PIN CONFIGURATION PIN DESCRIPTION Pin Name Description Pin No. VIN IC Power Supply. VIN pin can be connected to high-voltage directly. 1 GND IC Ground. The LED current is provided from this pin in typical application. 2 GD Gate Drive. To improve driving capability, GD can be connected with external MOSFET. 3 NC No Connection. 4 IS Output Current Setting. The output current is programmable from 10mA to 100mA by a resistor across IS pin and IC GND pin. 5 REF2.1 3 Nov., 2011
4 FUNCTION DESCRIPTION OPERATION The is conveniently used for high side application. The positive terminal of HV LED is connected with GND of. The negative terminal of HV LED is connected with GND of DC-BUS. The VIN of can be connected to rectified voltage after bridge directly. The maximum 400V operating voltage can cover most AC applications. OUTPUT CURRENT The output current is set by the resistor across IS and GND. It can be calculated as following equation. I 300mV TEMPERATURE COMPESATION The integrates temperature compensation. When the junction temperature is higher than 135 typically, the output current or the reference voltage of IS will be decreased by 20mV/. Normally, the output current will be zero if the junction temperature rises up to 150. This function is useful when environment temperature is abnormal high. will try to reduce the environment temperature by reduce the LED current. The temperature will be balanced at some level if the abnormal condition is not removed. The device will be protected and flicker doesn t happen. LED SHORT PROTECTION The worst case is LED shorted with two terminals. will try to regulate constant current. The voltage across will be very high. The junction temperature of will be increased by higher power dissipation. It will work into temperature compensation mode. It means that LED short protection is realized by temperature compensation. R REF2.1 4 Nov., 2011
5 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit VIN to GND ~+700 V IS to GND ~+7.0 V GD to GND ~+30.0 V Maximum Output Current I OUT 120 ma Operating Temperature T OPR -40~+105 Storage Temperature T STG -50~+150 Continuous Power Dissipation(Ta=25 ) P TOT 1.5(TBD) W REF2.1 5 Nov., 2011
6 ELECTRICAL CHARACTERISTICS (Unless otherwise specified, V IN =30V, TA=25 ) Parameter Symbol Conditions Min. Typ. Max. Unit Input Supply Voltage 1 V IN V Input Active Current I AC ua IS Voltage V IS mv Output Current Range IOUTR ma Output Current I OUT R IS =6Ω ma Output Current Regulation I OUT V IN =6~40V, R RS =10Ω 3 % GD Driving Capability I GD 30 ua Temperature Compensation T TRIG 135 Temperature Coefficient of RS after 135 K T 20 mv/ REF2.1 6 Nov., 2011
7 PACKAGE INFORMATION SOT89-5 Notes: Symbol Dimensions In Millimeters Min Nom Max A A b b c e D E E L All dimensions are in millimeters 2 Refer to JEDEC TO-243 REF2.1 7 Nov., 2011
8 REVISION HISTORY Date Revision No. Reference No. Modification 9/7/2011 REF1.0 Initial version 11/9/2011 REF2.0 New Definition 11/18/2011 PREF2.1 New Definition REF2.1 8 Nov., 2011
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CONSONANCE Low-Dropout High-Power Driver General Description: The current regulator operates from a 2.7V to 6V input voltage range and delivers a constant current that is up to 1.2A to high-brightness
Ordering Information Type Number PXXX Package Type: MR:SOT23 M5:SOT23-5 PR:SOT89-3 TB: TO92 Output Voltage: 25:2.5V 26:2.6V 36:3.6V Package Marking CX
General Description The Series are synchronous PFM step-up DC-DC converters with very low ripple noise due to the high operating frequency, and the maximum operating frequency is 300KHz. The output voltages
Green-Mode PWM Controller with Integrated Protections
Green-Mode PWM Controller with Integrated Protections Features Current mode PWM Very low startup current Under-voltage lockout (UVLO) Non-audible-noise green-mode control Programmable switching frequency
DESCRIPTION FEATURES APPLICATIONS BLOCK DIAGRAM. PT Bit Digital to Analog Converter
16-Bit Digital to Analog Converter DESCRIPTION PT8211 is a dual channel, 16 bit Digital-to-Analog Converter IC utilizing CMOS technology specially designed for the digital audio applications. The internal
APX9141. General Description. Pin Description. Applications. Ordering Information. Hall Effect Sensor IC with Reverse Voltage Protection
Hall Effect Sensor IC with Reverse Voltage Protection Features On-chip Reverse Voltage Protection On-chip Hall Sensor Low Operating Supply Voltage : 3 V High Output Sinking Capability up to 4mA Versatile