IS32LT3180-ZLA3-TR

IS32LT3180 DUAL INTENSITY, LINEAR CURRENT DRIVER FOR RCL January 2016 GENERAL DESCRIPTION FEATURES The IS32LT3180 is an eight channel linear current regulator for automotive rear tail light applications such as RCL (Rear Combination Lamps) and CHMSL (Center High Mounted Stop Lamps). It is fully programmable with two LED brightness levels for the different intensity requirements of “stop” bright (DC mode) and “tail” dim (PWM mode).      A logic level at the PWM pin is used to select between the tail and stop output conditions. The stop condition provides the highest intensity output, while the tail condition utilizes an internally generated PWM signal to reduce the intensity of the LEDs’ light output.         The sink current at the OUTx pins is easily set with a single resistor at the STOP pin. A second resistor at the TAIL pin sets the duty cycle of the internal PWM oscillator for dimming (less bright) the LED output when operating in the tail condition. An external FET controller is provided to maintain a constant headroom and power dissipation for the LED driver under wide varying supply voltages. For proper operation without Fault trigger, the use of external FET is recommended. Output current programmable from 10mA to 75mA Tail duty cycle programmable from 1% to 95% Linear voltage regulator to minimize consumption in the device Low dropout voltage of 0.8V@35mA Slew rate control on each output for better EMI performance PWM logic level input selects between full brightness and PWM dimming levels FAULT reporting LED open/short circuit detection Input overvoltage protection STOP pin overcurrent protection Thermal rollback of output current Withstand 50V load dump AEC-Q100 qualification APPLICATIONS The IS32LT3180 is offered in an eTSSOP-16 package.     Rear Combinational Lamp (RCL) Center High Mount Stop Light (CHMSL) Daytime running lamp Fog lamps  Turn signal TYPICAL APPLICATION CIRCUIT 1k VSTRING Q1 TAIL 0.1 F RGS 1k STOP 50 3 220nF 10k 2 ERC VCC CVCC 1 F 6 5 7 10nF RSTOP RTAIL 3.09k 7.72k 8 FAULT OUT1 1 RFB1 8.87k IS32LT3180 PWM STOP OUT8 FB TAIL GND 9 4 13 RFB2 1k Figure 1 Typical Application Circuit Lumissil Microsystems – www.lumissil.com Rev.B, 01/01/2016 1 IS32LT3180 PIN CONFIGURATION Package Pin Configuration (Top view) eTSSOP-16 PIN DESCRIPTION No. Pin Description 1 OUT1 Output current sink channel 1. 2 VCC Power input for the IC. 3 ERC External regulator control output. Connects to the gate of an external PMOS FET operated in linear mode. 4 FB Reference input voltage for the external resistor divider (1.05V typical) 5 PWM 6 FAULT 7 STOP Digital logic input. Logic high to select full intensity (DC output current) and logic low (or floating) to select lower intensity (PWM output current). Open drain fault flag. High impedance status to indicate LED open/short, STOP pin over current, over voltage, thermal rolloff conditions. Output current sink level setting pin. 8 TAIL PWM duty cycle programming pin. 9~12 OUT8 ~OUT5 Output current sink channel 8~5. 13 GND Ground connection for the IC. 14~16 OUT4 ~ OUT2 Output current sink channel 4~2. Thermal Pad Connect to GND. Lumissil Microsystems – www.lumissil.com Rev.B, 01/01/2016 2 IS32LT3180 ORDERING INFORMATION Automotive Range: -40°C To +125°C Order Part No. Package QTY/Reel IS32LT3180-ZLA3-TR eTSSOP-16, Lead-free 2500 Copyright  ©  2016  Lumissil  Microsystems.  All  rights  reserved.  Lumissil Microsystems reserves  the  right  to  make  changes  to  this  specification  and  its  products  at  any  time  without  notice.  Lumissil  Microsystems  assumes  no  liability  arising  out  of  the  application  or  use  of  any  information,  products  or  services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and  before placing orders for products.  Lumissil Microsystems does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can  reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in  such applications unless Lumissil Microsystems receives written assurance to its satisfaction, that:  a.) the risk of injury or damage has been minimized;  b.) the user assume all such risks; and  c.) potential liability of Lumissil Microsystems is adequately protected under the circumstances Lumissil Microsystems – www.lumissil.com Rev.B, 01/01/2016 3 IS32LT3180 ABSOLUTE MAXIMUM RATINGS VCC, ERC, PWM, FAULT, OUTx, FB TAIL, STOP OUTx current Operating junction temperature, TJ Storage temperature range, TSTG Operating ambient temperature range, TJ = TA Package thermal resistance (Junction to ambient), θJA Power dissipation, PD(MAX) (Note 2) ESD (HBM) ESD (CDM) -0.3 to 50V -0.3 to 5.5V 100mA 150°C -55°C ~ +150°C -40°C ~ +150°C 39.9°C/W 2.5W ±2kV ±750V Note 1: 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. Note 2: Detail information please refers to package thermal de-rating curve on Page 12. ELECTRICAL CHARACTERISTICS TJ = -40°C ~+150°C, VCC = 6V~16V, RSTOP =3.09kΩ, RTAIL =7.72kΩ. (Note 3) Symbol ICC Parameter Input current IOUT_MAX Maximum sink current IOUTACC Sink current accuracy ∆IOUT Current matching Condition Typ. Max. IOUTx =35mA, VCC =16V, 8 channels TJ = -40°C ~+125°C 6.0 8.0 TJ = +150°C (Note 5) 4.5 TJ = -40°C ~+125°C, VOUTx =1.2V Min. 75 TJ = +150°C (Note 5, 6) mA mA 25 IOUTx =35mA = (IOUT_MAX+IOUT_MIN)/2 VOUTx = 0.8V, TJ = -40°C ~+125°C (Note 4, 6) -8 0 8 1-2×IOUT/(IOUT_MAX+IOUT_MIN) IOUTx =35mA, TJ = -40°C ~+125°C -5 0 5 TJ = +150°C (Note 5, 6) Unit % % ±7 IL Current leakage VOUTx =42V LR Line regulation 6V< VCC