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L6227 Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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L6227 Scheda tecnica(HTML) 1 Page - STMicroelectronics |
1 / 22 page 1/22 L6227 September 2003 s OPERATING SUPPLY VOLTAGE FROM 8 TO 52V s 2.8A OUTPUT PEAK CURRENT (1.4A DC) s RDS(ON) 0.73Ω TYP. VALUE @ Tj = 25 °C s OPERATING FREQUENCY UP TO 100KHz s NON DISSIPATIVE OVERCURRENT PROTECTION s DUAL INDEPENDENT CONSTANT tOFF PWM CURRENT CONTROLLERS s SLOW DECAY SYNCHRONOUS RECTIFICATION s CROSS CONDUCTION PROTECTION s THERMAL SHUTDOWN s UNDER VOLTAGE LOCKOUT s INTEGRATED FAST FREE WHEELING DIODES TYPICAL APPLICATIONS s BIPOLAR STEPPER MOTOR s DUAL DC MOTOR DESCRIPTION The L6227 is a DMOS Dual Full Bridge designed for motor control applications, realized in MultiPower- BCD technology, which combines isolated DMOS Power Transistors with CMOS and bipolar circuits on the same chip. The device also includes two inde- pendent constant off time PWM Current Controllers that performs the chopping regulation. Available in PowerDIP24 (20+2+2), PowerSO36 and SO24 (20+2+2) packages, the L6227 features a non-dissi- pative overcurrent protection on the high side Power MOSFETs and thermal shutdown. 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 ORDERING NUMBERS: L6227N (PowerDIP24) L6227PD (PowerSO36) L6227D (SO24) PowerDIP24 (20+2+2) PowerSO36 SO24 (20+2+2) DMOS DUAL FULL BRIDGE DRIVER WITH PWM CURRENT CONTROLLER |
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