Hall Effect Sensor IC with Thermal Lock Protection and Auto Restart Function
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1 Hall Effect Sensor IC with Thermal Lock Protection and Auto Restart Function Features: Operate from 2.8V to 36V supply voltage. On-chip Hall sensor. Internal bandgap regulator allows temperature compensated operations and a wide operating voltage range. High output sinking capability up to 500mA for driving large load. Lower current change rate reduces the peak output voltages during switching. Available in rugged low profile SOT-25, SIP-4L packages. Built-in PWM Speed Control function. Built-in protection diode for reverse power supply fault. Built-in thermal lock protection and auto-restart function. General Description: WSH413 is designed to integrate Hall sensor with complementary output drivers and frequency generator together on the same chip, it is suitable for speed measurement, revolution counting, positioning, and DC brushless motors. It includes a temperature compensated voltage regulator, a differential amplifier, a Hysteresis controller, two Darlington output drivers capable of sinking 500mA current load and an PWM signal input pin capable of doing speed control. An on-chip protection diode is implemented to prevent reverse power fault. And built-in thermal lock protection and auto-restart function is suitable for super high speed fan. It can replace the function of lock protection and auto restart function. The power will be shutdown automatically at 125 C to prevent the coils be damaged and auto-restart after cooling down 5~10 C when thermal protected was activated. The temperature-dependent bias increases the supply voltage of the hall plates and adjusts the switching points to the decreasing induction of magnets at higher temperatures. Subsequently, the open collector output switches to the appropriate state. WSH413 are rated for operation over temperature range from 20 C to 100 C and voltage ranges from 2.8V to 36V. Pin Descriptions: SOT-25
2 Name P/I/O Pin# Description VDD P 1 Positive Power Supply Vss P 2 Ground PS I 3 PWM Input Pin OUT2 O 4 Output Pin 2 OUT1 O 5 Output Pin 1 Pin Descriptions: SIP-4L Name P/I/O Pin# Description Vcc P 1 Positive Power Supply OUT1 O 2 Output Pin #1 OUT2 O 3 Output Pin #2 Vss P 4 Ground Absolute Maximum Rating (at Ta=25 C) Supply Voltage Vcc V Output / FG breakdown Voltage Vout/Vfg V Magnetic flux density B Unlimited Reverse Protection Voltage Vr V Output Current continuous Ic mA Hold current Ih mA Peak current Ip A Operating Temperature Range Ta (-20 C to +100 C) Storage Temperature Range Ts (-65 C to +150 C) Package Power Dissipation Pd mw for SOT mw for SIP-4L Electrical Characteristics: (T=+25 C, Vcc=2.8V to 36V) Characteristic Symbol Test Conditions Min Typ Max Units Supply Voltage Vcc V Output Saturation Vout(sat) Vcc=24V, Ic=200mA V Voltage B > Bop Output Leakage Ileakage Vcc=24V, B < Brp < ua Current Supply Current Isupply Vcc=24V, Output & 5 10 ma Output / FG Rising Time Output / FG Falling Time Tr Tf FG Open Vcc=12V, RL=820Ω CL=20Pf Vcc=12V, RL=820Ω CL=20Pf us us
3 Function Block: Magnetic Characteristics: Characteristics Symbol Quantity Operate Point Release Point Bop Brp Grade A Grade B Grade C Grade A Grade B Grade C Ta= -20 C to +100 C Min Typ. Max Unit Gauss Gauss Hysteresis Window Bop-Brp Gauss Ordering Information: SIP- 4L: WSH413-XPAN Elec. Grade SIP-4L : SOT-25: WSH413-XPDN 1: A Grade (50 Gauss) 2: B Grade (70 Gauss) 3: C Grade (120 Gauss) Elec. Grade SOT-25: N: Non-lead Process 1: A Grade (50 Gauss) 2: B Grade (70 Gauss)
4 Test Circuit: SIP-4L SOT25
5 Package Information: SOT-25
6 SIP-4L
7 Application Circuit: SOT-25 SIP-4L Figure 1. Figure 2. Put additional resistor between Power line and Pin 1 of WSH413 can greatly incerease the surge voltage protection ability of system.
Distributed by: www.jameco.com 1-800-831-4242 The content and copyrights of the attached material are the property of its owner. Features - 3.5V to 20V DC operation voltage - Temperature compensation -
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HT2801S. Description. Features. Application. Typical Application Circuitry. High Accuracy CV/ CC Primary Sensing Regulation Controller IC
Description HT2801S is high performance primary sensing regulation and monolithic switchingmode power controller which is designed for small- power supply equipment with current mode control. Built- in
AH8113. AiT Semiconductor Inc. APPLICATION TYPICAL APPLICATION ORDERING INFORMATION
DESCRIPTION The is an integrated hall-effect sensor designed specifically to meet the requirements of low-power devices. e.g. as an On/Off switch in Cellular Flip-Phones, with battery operating voltages
FDD spindle motor driver
FDD spindle motor driver The is a one-chip IC designed for driving FDD spindle motors. This high-performance IC employs a 3-phase, full-wave soft switching drive system, and contains a digital servo, an