A29512 - 64K X 8 Bit CMOS 5.0 Volt-only/ Uniform

AMIC Technology에서 제조한 전자 부품 A29512은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.

A29512의 기능 및 특징 중 하나는 "64K X 8 Bit CMOS 5.0 Volt-only/ Uniform Sector Flash Memory" 입니다.

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A29512 기능

64K X 8 Bit CMOS 5.0 Volt-only/ Uniform Sector Flash Memory

AMIC Technology

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2927 DUAL FULL-BRIDGE PWM MOTOR DRIVER PRELIMINARY INFORMATION (Subject to change without notice) September 16, 1997 2927 DUAL FULL-BRIDGE PWM MOTOR DRIVER The A2927SEB motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 50 V and include internal pulse-width modulation (PWM) control of the output current to 1.5 A. 39 GND Data Sheet 29319.23 SENSE 1 PHASE 1 VREF 1 ENABLE 1 43 42 41 RC1 E 44 GND EN1 VCC θ1 40 6 5 4 3 2 1 LOGIC SUPPLY OUT 1A OUT 1B I10 I11 1 7 8 9 10 11 12 13 14 15 16 17 VBB PWM 1 38 37 1 36 35 34 33

Contents of page 4 out of 8 pages :

2927 DUAL FULL-BRIDGE PWM MOTOR DRIVER APPLICATIONS INFORMATION PWM CURRENT CONTROL: The UDN2927EB dual bridge is designed to drive both windings of a bipolar stepper motor. Output current is sensed and con- trolled independently in each bridge by an external sense resistor (RS), internal com- parator, and monostable multivibrator. When the bridge is turned ON, current increases in the motor winding and it is sensed by the external sense resistor until the sense voltage (VSENSE) reaches the level set at the comparator’s input: ITRIP = VREF/10 RS The comparator then triggers the mon- ostable which turns OFF the source driver of the bridge. The actual load current peak will be slightly higher than the trip point (espe- cially for low-inductance loads) because of the internal logic and switching delays. This delay (td) is typically 2 µs. After turn-off, the motor current will normally decay, circulating through the external ground clamp diode and sink transistor. The source driver’s OFF time (and therefore the magnitude of the current decrease) is determined by the monostable’s external RC timing components, where toff = RTCT within the range of 20 kΩ to 100 kΩ and 200 pF to 500 pF. When the source driver is re-enabled, the winding current (the sense voltage) is again allowed to rise to the comparator’s threshold. This cycle repeats itself, maintaining the average motor winding current at the desired level. Special circuitry has been included to prevent runaway current

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관련 데이터시트

부품번호	상세설명 및 기능	제조사
A29512	64K X 8 Bit CMOS 5.0 Volt-only/ Uniform Sector Flash Memory	AMIC Technology
A29512-55	64K X 8 Bit CMOS 5.0 Volt-only/ Uniform Sector Flash Memory	AMIC Technology