TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control TO-252-5L (PPAK) Pin Definition: 1. VIN 2. ISET 3. GND 4. EN 5. OUT General Description The TS19601 is a high voltage, low dropout current regulator of maximum output current up to 700mA. The output current is decided by an external resistor, and the output sink current could be disabled via OE pin. TS19601 internally also build-in thermal protection to prevent the chip over heat damage. Features ● ● ● ● ● ● Typical Application Circuit 0.5V VDROP @ 700mA 700mA Maximum Output Current Output Current Controlled by External Resistor 3µs Fast Response Output Stage Enable Control Output Sustaining Voltage up to 75V Wide Supply Voltage Range: 5~50V Applications ● ● ● ● High Power LED Driver RGB Full Color Power LED Driver LCD Monitor/TV LED Backlight Driver LED Table Lamp Ordering Information Part No. Package Packing TS19601CP5 RO TO-252-5L 2.5Kpcs / 13” Reel Absolute Maximum Rating Parameter Input Voltage Output Sustaining Voltage Output Sink Current Output Enable Voltage Operating Junction Temperature Range Storage Temperature Range Thermal Resistance Junction to Air Symbol Value Unit VIN VDSN IOUT VEN TOPR TSTG θJA 55 75 700 13.2 +150 -55 ~ +150 80 V V mA V ºC ºC ºC/W Recommend Operating Conditions Parameter Symbol Min Typ Max Unit Input Voltage VIN 5 -- 50 V Output Enable Voltage VEN -- -- 12 V Output Sink Current TOPR 100 -- 700 mA Operating Free-Air Temperature Range TSTG -40 -- +85 ºC 1/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Electrical Specification (VIN=24V, TA=25oC, unless otherwise specified.) Parameter Conditions Output Current Output Current Deviation Min Typ Max VOUT =0.5V, RSET=3kΩ -- 200 -- VOUT =0.5V, RSET=1.71kΩ -- 350 -- VOUT =0.5V, RSET=1kΩ -- 600 -- VOUT =0.5V, IOUT =350mA~600mA -- -- ±5 % 200 -- 1400 µA SET Current Range Unit mA Minimum Output Current ISET=200µA -- 100 -- mA Maximum Output Current ISET=1400µA -- 700 -- mA Output Dropout Voltage ISET=1000µA (Note 1) -- 0.35 -- V Load Regulation VOUT =0.5V to 3V, IOUT =350mA -- -- 3 mA/V Line Regulation VOUT =0.5V, IOUT =350mA, VIN=5~50V -- 0.08 0.15 %/V 0 -- 0.8 V 2 -- 12 V Enable Low Input Current -20 -- +20 µA Enable High Input Current -5 -- +5 µA -- 3 -- µS -- 3 -- µS -- -- 5 mA Enable Low Input Voltage Enable High Input Voltage Output Enable Delay Time Output Disable Delay Time Should lower than VIN EN from low to high. VOUT=0.5V, IOUT=350mA, Duty 50% EN from high to low. VOUT=0.5V, IOUT=350mA, Duty 50% Supply Current Consumption Note 1: Output Dropout Voltage: Duty 90% x IOUT @ VOUT=0.5V Pin Function Description Pin Number Pin Name Pin Function 1 VIN Power Supply Pin 2 ISET Output Current Setting pin. Connect a resistor from ISET to GND to set the LED bias current. ISET=1.2V/RSET 3 GND Ground Pin 4 EN Output Stage Enable Control pin. High enable the output pin. It can be left floating for normally on. 5 OUT Output pin. Sink current is decided by the current on RSET connected to ISET pin. IOUT=500 x ISET=500 x 1.2V/RSET 2/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Electrical Characteristics Curve Figure 1. Supply Current vs. Supply Voltage Figure 2. ISET Voltage vs. Junction Temperature Figure 3. Output Current vs. Supply Voltage Figure 4. Output Current vs. Dropout Voltage 3/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Application Information TS19601 is a high voltage, low dropout current regulator for maximum output current up to 700mA with OE pin control. The current could be linearly adjusted through variable resister connected to ISET pin, or by PWM control via OE pin. Although the absolute maximum rating of OUT pin 75V, the dropout voltage between OUT pin and GND pin should not be too large when current is sinking because of the thermal dissipation capability of the package. Here are some of the typical application examples: DC Voltage Input Any DC voltage level between 5V to 50V could be adopted as power source VDD for typical application of TS19601 as long as VDD is larger than the total forward voltage drop of the LED string (at expecting current) by 0.35V. If 50V ~ 60V voltage level is adopted as power source to positive end of the LED string, one Zener shunt regulator could be used to provide appropriate voltage to VDD pin. 4/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Application Information (Continue) LED Backlight Solution TS19601 could coordinate with any type of DC-to-DC converter through feedback path to realized LED backlight module. The number of LEDs in the string is variable even with certain fixed power source since the output voltage of the DC-to-DC converter could be modulated according to feedback signal. AC Voltage Input TS19601 could work with any kind of well-known or well-developed switch-mode power supply system. Simply cut off the internal feedback path of the power supply system and then feed the signal from TS19601 back to the power supply system instead. 5/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Thermal Consideration Information The Maximum Power Dissipation on Current Regulator PD(MAX) = VOUT(MAX) × IOUT(NOM) + VIN(MAX) × IDD VOUT(MAX) = the maximum voltage on output pin; IOUT(NOM) IDD = the nominal output current; = the quiescent current the regulator consumes at IOUT(NOM); VIN(MAX) = the maximum input voltage. Thermal Consideration The TS19601 has internal power and thermal limiting circuitry designed to protect the device under overload conditions. However, maximum junction temperature ratings should not be exceeded under continuous normal load conditions. The thermal protection circuit of TS19601 prevents the device from damage due to excessive power dissipation. When the device junction temperature rises to approximately 150°C, the regulator will be turned off. When power consumption is over about 1000mW (TO-252 package, at TA=70°C), additional heat sink is required to control the junction temperature below 125°C. The junction temperature is: TJ = PD (θJT +θCS +θSA ) + TA PD : Dissipated power. θJT: Thermal resistance from the junction to the mounting tab of the package. For TO-252 package, θJT = 7.0°C/W. θCS: Thermal resistance through the interface between the IC and the surface on which it is mounted. θSA: Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink). (typically, θCS < 1.0°C /W) If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with several through-hole vias. PCB θJA ºC/W PCB heat sink size 59 500 45 1000 38 1500 6/8 33 2000 27 3000 24 4000 21 5000 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control TO-252-5L Mechanical Drawing DIM A B C D E F G H I J TO-252-5L DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 6.350 6.730 0.250 0.265 9.080 10.440 0.357 0.411 0.460 0.640 0.018 0.025 1.27BSC 0.05BSC 2.19 2.380 0.086 0.094 0.460 0.570 0.018 0.022 1.400 1.780 0.055 0.070 0.460 0.570 0.018 0.022 5.34 5.550 0.210 0.219 1.520 2.030 0.060 0.080 Marking Diagram Y M L = Year Code = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec) = Lot Code 7/8 Version: B11 TS19601 700mA High Voltage Adjustable Current Regulator With Enable Control Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. 8/8 Version: B11