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L6235Q Datasheet(PDF) 1 Page - STMicroelectronics |
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L6235Q Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 33 page  November 2011 Doc ID 018997 Rev 2 1/33 33 L6235Q DMOS driver for 3-phase brushless dc motor Features ■ Operating supply voltage from 8 to 52 V ■ 5.6 A output peak current ■ RDS(on) 0.3 Ω typ. value @ TJ = 25 °C ■ Operating frequency up to 100 kHz ■ Non-dissipative overcurrent protection ■ Diagnostic output ■ Constant tOFF PWM current controller ■ Slow decay synchronous rectification ■ 60° and 120° Hall effect decoding logic ■ Brake function ■ Tacho output for speed loop ■ Cross conduction protection ■ Thermal shutdown ■ Undervoltage lockout ■ Integrated fast freewheeling diodes Description The L6235Q is a DMOS fully integrated 3-phase motor driver with overcurrent protection. Realized in BCDmultipower technology, the device combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to drive a 3-phase BLDC motor including: a 3-phase DMOS bridge, a constant OFF time PWM current controller and the decoding logic for single ended Hall sensors that generates the required sequence for the power stage. Available in QFN48 7x7 package, the L6235Q features a non- dissipative overcurrent protection on the high-side power MOSFETs and thermal shutdown. QFN-48 (7 x 7 mm) Figure 1. Block diagram CHARGE PUMP VOLTAGE REGULATOR HALL-EFFECT SENSORS DECODING LOGIC THERMAL PROTECTION TACHO MONOSTABLE OCD1 OCD OCD OCD2 10V 5V VCP VSA GATE LOGIC VBOOT VBOOT OUT1 OUT2 SENSEA VSB OUT3 SENSEB DIAG EN FWD/REV BRAKE H3 H1 RCPULSE TACHO RCOFF H2 OCD3 ONE SHOT MONOSTABLE MASKING TIME VBOOT OCD1 10V VBOOT OCD2 10V VBOOT OCD3 10V SENSE COMPARATOR + - PWM VREF AM02555v1 www.st.com |
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