Maxim launches a highly integrated high voltage LED driver for automotive electronics

Maxim launched a 3 channel, linear high voltage, high brightness LED driver MAX16823, built-in LED open circuit detection, suitable for automotive exterior and interior lighting applications. The device operates from an input voltage range of 5.5V to 40V to ensure that the cold start and load rejection (up to 45V) is met. Each channel of the MAX16823 can be a string or string of high brightness LED (HB LED) provides current up to 70mA, when the driving current is more than 70mA only added a cheap bipolar transistor can be realized. The device also features an active high level, open drain LEDGOOD output for LED open circuit detection. MAX16823 combines a variety of functions, has a high degree of integration, suitable for automotive taillights, brake lights (RCL) (CHMSL), and RGB indicator lights. The current MAX16823 each channel through the external current detecting resistor in series with the LED set, when necessary, can be different on LED are respectively arranged at different current. In the whole operating voltage and temperature range, accurate internal reference can ensure the accuracy of LED current is + 5%. The device is provided with three - way brightness input, which can realize PWM dimming and on / off control in a wide range. The waveform shaping circuit minimizes the EMI of the low frequency PWM dimming, and has fast turn-on and turn off time. In addition, each channel has a very low pressure (0.7V, maximum), simplified the low input voltage, multiple LED series design. On the 3.4 V regulator for the external circuit of the power supply can be provided when the current is up to 4mA. MAX16823 LED driver with high reliability, provide output short-circuit protection, overvoltage protection, undervoltage lockout. MAX16823 at -40 DEG C to +125 DEG C automotive temperature range, the device with 16 pin, TQFN lead-free package bare pad (MAX16823ATE+) or TSSOP (MAX16823AUE+) lead-free package. MAX16823ATE+ at $0.99, MAX16823AUE+ at $0.97 (1000 tablets, FOB USA).