october 2009 doc id 15086 rev 2 1/18 18 PM8834 4 a dual low side mosfet driver features dual independent low side mosfet driver with 4 a sink and source capability independent enable for each driver driver output parallel ab ility to support higher driving capability matched propagation delays cmos/ttl compatib le input levels wide input supply voltage range: 5 v to 18 v embedded driver anti-shoot-through protection low bias switching current short propagation delays wide operative temperature range: -40 c to 105 c s08 and vfdfpn8 3x3 mm package applications switch mode power supplies dc/dc converters motor controllers line drivers class d switching amplifiers description PM8834 is a flexible, high-frequency dual low- side driver specifically designed to work with high capacitive mosfets and igbts. both PM8834 outputs can sink and source 4 a independently. higher driving current can be obtained by putting in parallel the two pwm output. PM8834 provides two enable pins which can be used to enable the operation of one or both of the output lines. PM8834 works with cmos/ttl compatible pwm signal. the driver is available in so8 (PM8834) and vfdfpn8 3x3 mm (PM8834q) packages. vfdfpn8 so8 table 1. device summary order codes temp range, cpackage packing PM8834 -40 - 105 so8 tu b e PM8834tr tape and reel PM8834q vfdfpn8 tu b e PM8834qtr tape and reel www.st.com
contents PM8834 2/18 doc id 15086 rev 2 contents 1 typical application cir cuit and block diagram . . . . . . . . . . . . . . . . . . . . 3 1.1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin description and c onnection diagram . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 device description and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1.1 pwm inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1.2 enable pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.2 output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 parallel output operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.4 gate driver voltage flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 design guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 output series resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.2 power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.3 layout guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PM8834 typical application circuit and block diagram doc id 15086 rev 2 3/18 1 typical application circuit and block diagram 1.1 block diagram figure 1. block diagram ! - v / 5 4 ? 0 - 0 7 - ? ' . $ / 5 4 ? 0 7 - ? 6 # # % . ! " , % ? % . ! " , % ? 3 w i t c h i n g - a n a g e m e n t , o g i c $ r i v e r 6 # # 3 w i t c h i n g - a n a g e m e n t , o g i c $ r i v e r 5 6 , / 6 # # 6 # #
pin description and connection diagram PM8834 4/18 doc id 15086 rev 2 2 pin description and connection diagram figure 2. pins connection (top view) 2.1 pin description table 2. pin description / 5 4 ? 6 # # / 5 4 ? % . ! " , % ? 0 7 - ? ' . $ 0 7 - ? % . ! " , % ? 0 - ! - v 2 8 7 b 9 & |