XR46004ETCTR-Q

XR46004-Q AEC-Q100 Qualified 600mA High Voltage Adjustable Current Regulator with Enable Control Description The XR46004-Q is a high voltage, low dropout current regulator of output current up to 600mA in maximum. Users can adjust the output current from 100mA to 600mA through an external resistor, RSET, which gives users flexibility in controlling the light intensity of the LEDs. Further, the LED brightness is adjustable via the OE pin with a Pulse Width Modulation signal. The thermal protection function protects the IC from over temperature damage. Also, the exposed thermal pad enhances the package power dissipation. FEATURES ■■ Automotive AEC-Q100 Qualified ■■ 600mA maximum output current ■■ Output current adjustable via external resistor ■■ 3µs fast response output stage enable control ■■ Output sustaining voltage up to 75V ■■ Wide supply voltage range: 5V to 50V ■■ TO-252-5L package ■■ Green package APPLICATIONS ■■ Map lights ■■ Accent lights ■■ Projector lights Typical Application 5V~50V CBP VDD Enable OE ISET RSET XR46004-Q OUT GND CO Figure 1. Typical Application REV1A 1/11 XR46004-Q Absolute Maximum Ratings Operating Conditions Stresses beyond the limits listed below may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Supply voltage, VDD..............................................5V to 50V Supply voltage, VDD....................................................... 55V Operating junction temperature, TJ............... -40°C to125°C Output sustaining voltage, VOUT.................................... 75V Maximum operating junction temperature, TJ............ 150°C Output sink current, IOUT........................................... 700mA AEC-Q100................................................................ Class 1 Output enable voltage, VOE.............................................. 6V Output sink current, IOUT...........................100mA to 600mA Output enable voltage, VOE............................................ 10V Storage temperature range.......................... -40°C to 150°C Lead temperature (soldering, 10 seconds)................. 260°C REV1A 2/11 XR46004-Q Electrical Characteristics Specifications are for Operating Junction Temperature of TJ = 25°C only; limits applying over the full Operating Junction Temperature range are denoted by a “•”. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise noted, values are at VDD = 24V. Symbol Parameter Conditions VOUT = 0.5V, RSET = 3kΩ Output current VOUT = 0.5V, RSET = 1.71kΩ • Min Typ Max 185 200 216 175 342 • SET current range 230 360 325 VOUT = 1.0V, RSET = 1kΩ Units 381 mA 398 620 200 1400 µA Minimum output current ISET = 200µA, VOUT = 0.5V 100 mA Maximum output current ISET = 1200µA, VOUT = 1V 600 mA Output dropout voltage ISET = 700µA(1) 0.35 V Load regulation VOUT = 0.5V to 3V Line regulation VOUT = 0.5V, IOUT = 350mA, VDD = 5V to 50V 0.08 Thermal shutdown junction temperature Hysteresis = 20°C(2) 160 °C 20 °C Thermal shutdown hysteresis “Low” input voltage 3 mA/V 0.15 %/V 0 0.8 V 2 Min {VDD, 6} V “High” input voltage Must be lower than VDD “Low” input current VOE = GND -20 20 µA “High” input current VOE = 5V -5.0 5.0 µA Output enable delay time OE from Low to High, VOUT = 0.5V, IOUT = 350mA, 50%(2) 3 µs Output disable delay time OE from High to Low, VOUT = 0.5V, IOUT = 350mA, 50%(2) 3 µs Supply current consumption 5 mA NOTES: 1. Output dropout voltage: 90% x IOUT(VOUT=500mV) 2. Guarantee by design, not by production test. REV1A 3/11 XR46004-Q Pin Configuration 5 OUT 4 OE 3 GND 2 ISET 1 VDD TO-252-5L, Top View Pin Functions Pin Number Pin Name 1 VDD 2 ISET Description Power supply pin. Output current setting pin. Connect a resistor RSET between the ISET and GND for setting the LED driving current. IOUT(mA) = 630 - 10 RSET(kΩ) This pin must be connected to ground with a 1kΩ or higher value resistor. 3 GND 4 OE 5 OUT Thermal Tab (GND) Ground pin. Output stage enable control pin. High enables the OUT pin. It can be left floating for normally on. Constant current output pin. Sink current is decided by the current on RSET connected to ISET pin. Heat dissipation pad. Connect to the ground plane and GND pins in the PCB layout. Must be soldered to electrical ground on the PCB. NOTE: The thermal tab is suggested connect to GND on PCB. And thermal conductivity will be improved, if a copper foil on PCB is soldered with thermal pad. REV1A 4/11 XR46004-Q Typical Performance Characteristics Unless otherwise noted, TA = 25°C. 600 215 Output Current (mA) IOUT (mA) 210 205 200 195 190 -50 IOUT = 500mA 500 400 300 200 IOUT = 150mA 100 0 -25 0 25 50 75 Junction Temperature (ºC) 100 125 150 VDROP = 0.5V, TA = 25˚C 20 0 40 60 Supply Voltage (V) Figure 2: IOUT @ 200mA vs. Junction Temperature, RSET = 3kΩ Figure 3: Output Current vs. Supply Voltage 500.0 Output Current (mA) 400.0 IOUT = 340mA 300.0 200.0 IOUT = 150mA 100.0 0.0 VDD = 24V, TA = 25˚C 0.00 2.00 1.00 Dropout Voltage (V) 3.00 Figure 4: Output Current vs. Dropout Voltage Figure 5: VOUT Sink Current. OE Pin Slow Ramp 0-6V, ISET = 3KΩ, VDROP = 0.5V Figure 6: VOUT Sink Current. OE Pin 6V Square Wave, ISET = 3KΩ, VDROP = 0.5V REV1A 5/11 XR46004-Q Functional Block Diagram VDD OE Regulator Current Mirror and Control Circuit Band-gap Reference OUT VREF + – GND ISET Figure 7. Functional Block Diagram Applications Information The XR46004-Q is a high voltage, low dropout current regulator for output current up to 600mA in maximum. The OE pin is used for enabling/disabling the output stage of the chip. The current can be linearly adjusted through a variable resister connected to the ISET pin, or by a PWM control signal via the OE pin. Although the absolute maximum rating of the OUT pin is 75V, the dropout voltage between the OUT pin and the GND pin should not be too large when the current is sinking because the thermal dissipation capability of the package is limited. Here are some of the typical application examples: DC Voltage Input As shown in Figure 8, any DC voltage between 5V and 50V can be adopted as power source VDD for typical application of XR46004-Q as long as the voltage between the OUT pin and the GND pin (VDD voltage minus the total forward voltage drop of the LED string) is larger than the dropout voltage needed for that expecting current. If 50V ~ 75V voltage is adopted as the power source to the positive end of the LED string, one Zener shunt regulator can be used to provide appropriate voltage to the VDD pin, as shown in Figure 9. >50VDC