L6571AD STMicroelectronics

L6571 High voltage half bridge driver with oscillator Features High voltage rail up to 600 V BCD off line technology 15.6 V Zener clamp on Vs Driver current capability: DIP-8 SO8 Sink current = 270 mA can be programmed using external resistor and Source current = 170 mA capacitor. Very low start up current: 150 mA The internal circuitry of the device allows it to be Undervoltage lockout with hysteresis driven also by external logic signal. Programmable oscillator frequency The output drivers are designed to drive external Dead time 1.25 s (L6571A) or 0.72 s nchannel power MOSFET and IGBT. The internal (L6571B) logic assures a dead time to avoid cross- conduction of the power devices. dV/dt immunity up to 50 V/ns ESD protection Two version are available: L6571A and L6571B. They differ in the internal dead time: 1.25 s and 0.72 s (typ.) Description The device is a high voltage half bridge driver with built in oscillator. The frequency of the oscillator Figure 1. Block diagram + 9 5 +9 & 96 9 %227 6 +9* %, 6 /(9(/ & %227 52 7 5(*8/ 6+,)7(5 +,*+ 6, ( 9 5,9(5 6 5 %8))(5 ) 287 /2 5 ) & &203 ) 9 6 & /2: 6, ( ) 5,9(5 &203 /2*,& * *1 ,1 January 2010 Doc ID 4946 Rev 6 1/12 www.st.com 12 /9Contents L6571A - L6571B Contents 1 Maximum ratings 3 1.1 Absolute maximum ratings . 3 1.2 Thermal data . 3 1.3 Recommended operating conditions . 3 2 Pin connection 4 3 Electrical data 5 4 Oscillator frequency . 6 5 Package mechanical data . 8 6 Order information 10 7 Revision history . 11 2/12 Doc ID 4946 Rev 6