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L6227Q データシート(PDF) 1 Page - STMicroelectronics |
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L6227Q データシート(HTML) 1 Page - STMicroelectronics |
1 / 27 page June 2008 Rev 2 1/27 27 L6227Q DMOS dual full bridge driver with PWM current controller Features ■ Operating supply voltage from 8 to 52 V ■ 2.8 A output peak current (1.4 A DC) ■ RDS(on) 0.73 Ω typ. value @ TJ = 25 °C ■ Operating frequency up to 100 kHz ■ Non dissipative overcurrent protection ■ Dual independent constant tOFF PWM current controllers ■ Slow decay synchronous rectification ■ Cross conduction protection ■ Thermal shutdown ■ Under voltage lockout ■ Integrated fast free wheeling diodes Applications ■ Bipolar stepper motor ■ Dual or quad DC motor Description The L6227Q is a DMOS dual full bridge designed for motor control applications, realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device also includes two independent constant off time PWM current controllers that performs the chopping regulation. Available in VQFPN32 5 mm x 5 mm package, the L6227Q features a non-dissipative overcurrent protection on the high side power MOSFETs and thermal shutdown. VFQFPN32 5 mm x 5 mm www.st.com Figure 1. Block diagram D99IN1085A GATE LOGIC OCDA OCDB OVER CURRENT DETECTION OVER CURRENT DETECTION GATE LOGIC VCP VBOOT ENA IN1A IN2A ENB IN1B IN2B VREFA VBOOT 5V 10V VSA V SB OUT1A OUT2A OUT1B OUT2B SENSEA CHARGE PUMP VOLTAGE REGULATOR ONE SHOT MONOSTABLE MASKING TIME THERMAL PROTECTION VBOOT VBOOT 10V 10V BRIDGE A SENSE COMPARATOR BRIDGE B RCA + - SENSEB VREFB RCB PWM |
同様の部品番号 - L6227Q |
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同様の説明 - L6227Q |
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