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Features and Benefits
Continuous-time operation
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Description
The Allegro® A1101-A1104 and A1106 Hall-effect switches are next generation replacements for the popular Allegro 312x and 314x lines of unipolar switches. The A110x family, produced with BiCMOS technology, consists of devices that feature fast power-on time and low-noise operation. Device programming is performed after packaging, to ensure increased switchpoint accuracy by eliminating offsets that can be induced by package stress. Unique Hall element geometries and low-offset amplifiers help to minimize noise and to reduce the residual offset voltage normally caused by device overmolding, temperature excursions, and thermal stress.
The A1101-A1104 and A1106 Hall-effect switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator permits operation from 3.8 to 24 V. The extensive on-board protection circuitry makes possible a ±30 V absolute maximum voltage rating for superior protection in automotive and industrial motor commutation applications, without adding external components. All devices in the family are identical except for magnetic switchpoint levels.
The small geometries of the BiCMOS process allow these devices to be provided in ultrasmall packages. The package styles available provide magnetically optimized solutions for most applications. Package LH is an SOT23W, a miniature low-profile surface-mount package, while package UA is a three-lead ultramini SIP for through-hole mounting. Each package is lead (Pb) free, with 100% matte tin plated leadframes.
Replacement Device Characteristics Table
Device |
A110x Characteristics | ||||||
---|---|---|---|---|---|---|---|
BOP |
BRP |
Hys | |||||
Legacy |
Replacement |
Min |
Max |
Min |
Max |
Min |
Max |
3141 |
A1101 |
30 |
175 |
10 |
145 |
20 |
80 |
3142 |
A1102 |
115 |
245 |
60 |
190 |
30 |
80 |
3143 |
A1103 |
205 |
355 |
150 |
300 |
30 |
80 |
3144 |
A1104 |
35 |
450 |
25 |
430 |
20 |
- |
3121 |
A1106 |
260 |
430 |
160 |
330 |
70 |
140 |
Functional Block Diagram
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Allegro’s products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
dzsc/13/4515/13451560.jpg dzsc/13/4515/13451560.jpg 应用:汽车HTD大灯开发IC,功能强大,性能稳定,用与超薄型
L6208DMOS DRIVER FOR BIPOLAR STEPPER MOTOR 1.OPERATING SUPPLY VOLTAGE FROM 8 TO 52V2.5.6A OUTPUT PEAK CURRENT (2.8A RMS)3.R 0.3? TYP. VALUE @ T = 25!a DS(ON) j4.OPERATING FREQUENCY UP TO 100KHz5.NON DISSIPATIVE OVERCURRENT PROTECTION6.DUAL INDEPENDENT CONSTANT t PWM OFF CURRENT CONTROLLERS7.FAST/SLOW DECAY MODE SELECTION8.FAST DECAY QUASI-SYNCHRONOUS RECTIFICATION9.DECODING LOGIC FOR STEPPER MOTOR FULL AND HALF STEP DRIVE10.CROSS CONDUCTION PROTECTION11.THERMAL SHUTDOWN12.UNDER VOLTAGE LOCKOUT13.INTEGRATED FAST FREE WHEELING DIODES dzsc/13/4515/13451561.jpg dzsc/13/4515/13451561.jpg