PT6923 3-Segment AC Input HV LED Driver DESCRIPTION PT6923 is a special current regulator to drive HV LED. The proprietary 3-Segment driving topology will improve power factor, THDI and efficiency. EMI issue will be avoided by special technology during segment switching. Few external components design is very flexible in many compact size applications. PT6923 supports maximum 400V input voltage that ensures the high reliability for HV LED lighting. LED open/short is protected by PT6923. The high voltage will be absorbed by PT6923 itself. LEDs will never face high voltage problem. PT6923 is integrated temperature compensation function. When internal junction temperature is higher than 130℃(Typ.), PT6923 will decrease the output current linearly. The output current will be zero when internal junction temperature reaches 150 ℃ (Typ.). This protection method effectively avoids the flicker problem during abnormal environment temperature. FEATURES 5V~400V Operating Voltage Maximum 100mA Peak Output Current ±5% Current Accuracy Proprietary 3-Segment Driving Technology Low THDI High Power Factor High Efficiency Few External Components Electrical Capacitor Needless LED Open/Short Protection Temperature Compensation When TJ>130℃(Typ.), output current will decrease. Output current will be zero when TJ=150℃(Typ.) TO252-5L Package ESOP-8L Package APPLICATIONS LED Bulb LED Tube Lamp Compact Size LED Lighting BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No.233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT6923 TYPICAL APPLICATION 3-Segment Current Regulator for HV LED V1.4 2 May 2015 PT6923 ORDER INFORMATION Valid Part Number PT6923 PT6923-HS Package Type 5-Pin, TO252 8-Pin, ESOP,150mil Top Code PT6923 PT6923-HS PIN CONFIGURATION PIN DESCRIPTION Pin Name Description DR1 DR2 GND DR3 IC Power Supply and Drain of the First Switch. Drain of the Second Switch. IC Ground. Drain of the Third Switch. Output Current Setting. The output current is programmable with a resistor across IS pin and IC GND pin. IS V1.4 3 Pin No. TO252-5 ESOP-8 1 1 2 2 3 7 4 3 5 6 May 2015 PT6923 FUNCTION DESCRIPTION OPERATION The PT6923 is conveniently used for HV LED or LED string application. Refer to the typical application, the LED string is separated three segments which controlled apart by DR1, DR2, DR3. The three LED segments work subsequently with increasing AC input voltage. While the AC input voltage increasing, DR1 will work firstly. Then, DR2, DR3 will work following the continuously increasing AC input voltage. While the AC input voltage dropping, DR3 will be off firstly. Then, DR2, DR1 will be off following the continuously dropping AC input voltage. The input current will change with input voltage. That is to say, the LED loading will be more like a resistive loading. Higher power factor and low THDI will be got easily by this topology. OUTPUT CURRENT The output current is set by the resistor across IS and GND. For 3-Segments application, the output current flowing through DR1, DR2, DR3 can be calculated as following equation. IDR1 = 100mV 200mV RIS RIS , IDR2 = , IDR3 = 300mV RIS The output current flowing through DR1, DR2 and DR3 is controlled by internal circuit with fixed ratio. While the IDR2 is twice of IDR1, and IDR3 is three times of IDR1. TEMPERATURE COMPENSATION The PT6923 integrates temperature compensation function. When the internal junction temperature is higher than 130℃ typically, the IS threshold voltage will decrease by 15mV/℃. 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. PT6923 will try to reduce the environment temperature by reducing 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 one of the LED segments shorted with two terminals. PT6923 still will try to regulate constant current. But the voltage across DR3 will be very high. The internal junction temperature will increase because of higher power dissipation. PT6923 will work into temperature compensation mode. It means that LED short protection is realized by temperature compensation. LED OPEN PROTECTION The PT6923 provides LED open protection function. If the LED segment1 open, IC will be shut-down without power supply. If the LED segment2 open, there isn’t current flowing through LED segment3. The voltage across DR1 will be very high, this will cause PT6923 working into temperature compensation mode. If the LED segment 3 open, the voltage across DR2 will be very high. Similarly, PT6923 will work into temperature compensation mode. V1.4 4 May 2015 PT6923 ABSOLUTE MAXIMUM RATINGS Parameter DR1, DR2, DR3 to GND IS to GND Maximum Peak Output Current Operating Temperature Range Storage Temperature Range Operating Maximum Junction Temperature TO252-5L ESOP-8L Junction to Ambient Thermal Resistance Symbol IOUT TOPR TSTG TJ RJA RJA Rating -0.3~+600 -0.3~+0.5 100 -40~+105 -40~+150 150 40 62 Unit V V mA ℃ ℃ ℃ ℃/W ℃/W ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA=25℃) Parameter Input Supply Voltage Range Input Active Current Symbol VDR IAC VIS1 IS Threshold Voltage IS Threshold Voltage Line Regulation Voltage Drop of Internal Switch Peak Output Current Range Temperature Compensation Threshold Temperature Coefficient of VIS3 after TTRIG V1.4 VIS2 VIS3 △VIS VDRD IOUTR TTRIG Conditions Min. 5.0 VDR1=30V, DR2, DR3 Floating, IS Floating VDR1=30V, DR2, DR3 Floating, RIS=1KΩ VDR1=VDR2=30V, DR3 Floating, RIS=1KΩ VDR1=VDR2=VDR3=30V, RIS=1KΩ VDR1=VDR2=VDR3=5~30V, RIS=1KΩ IDRX=60mA KT 5 Typ. Max. 400 300 Unit V uA 92 100 108 mV 190 200 210 mV 285 300 315 1 130 mV % V mA ℃ -15 mV/℃ 5 1 100 May 2015 PT6923 TYPICAL PERFORMANCE CHARACTERISTICS (Unless otherwise specified, TA=25℃) Input Active Current vs VDR1 IS Threshold Voltage vs Input Voltage 299 250 298 IAC (uA) 200 VIS3 (mV) 300 1# 150 2# 100 3# 50 296 1# 295 2# 294 3# 293 292 0 0 5 10 15 VDR1 (V) 20 25 5 30 IS Threshold Voltage vs Temperature 15 Input Voltage (V) 25 IS Threshold Voltage vs Temperature 305 Thermal Protection 350 300 299 1# 296 2# VIS3 (mV) VIS3 (mV) 302 3# 293 250 200 1# 150 2# 100 3# 50 290 0 -15 V1.4 297 5 25 45 65 85 Temperature (℃) 105 125 105 6 115 125 135 145 Temperature (℃) 155 165 May 2015 PT6923 PACKAGE INFORMATION 5-PIN, TO252 Symbol A1 A2 b c D D1 E1 E e L1 θ Dimensions (mm) Nom 2.30 6.50 5.30 REF 5.50 10.00 1.27 BSC. 3.10 - Min 2.10 0.46 0.49 6.30 5.30 9.40 3.00 0° Max 0.25 2.50 0.60 0.56 6.70 5.70 10.40 3.20 8° Notes: 1. All dimensions are in millimeters 2. Refer to JEDEC TO-252AD V1.4 7 May 2015 PT6923 8-PIN, ESOP, 150MIL Symbol A A1 A2 b c e D D1 E E1 E2 L θ Dimensions(mm) Nom. 1.27 BSC 4.90 BSC 6.00 BSC 3.90 BSC 0.60 - Min. 0.00 1.25 0.31 0.10 2.81 2.05 0.40 0° Max. 1.70 0.15 0.51 0.25 3.30 2.41 1.27 8° Notes: 1. Refer to JEDEC MS-012 BA 2. All dimensions are in millimeter. V1.4 8 May 2015 PT6923 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.4 9 May 2015