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| WSH413 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 125C to prevent the coils be damaged and auto-restart after cooling down 5~10C 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 100C and voltage ranges from 2.8V to 36V. Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 Name VDD Vss PS OUT2 OUT1 Name Vcc OUT1 OUT2 Vss Supply Voltage P/I/O P P I O O P/I/O P O O P Pin# Description Positive Power Supply Ground PWM Input Pin Output Pin 2 Output Pin 1 Description Positive Power Supply Output Pin #1 Output Pin #2 Ground 36V 46V Unlimited 36V 350mA 500mA 1.0A (-20C to +100C) (-65C to +150C) 350mw for SOT-25 500mw for SIP-4L Pin# Vcc -------------------------- Output / FG breakdown Voltage Vout/Vfg --------------------Magnetic flux density B -------------------------Reverse Protection Voltage Output Current continuous Hold current Peak current Operating Temperature Range Storage Temperature Range Package Power Dissipation Vr Ic Ih Ip Ta ---------------------------------------------------------------------------------------------------------------------------- Ts -------------------------Pd -------------------------- Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current (T=+25C, Vcc=2.8V to 36V) Symbol Test Conditions Min Typ Max Units Vcc V Vout(sat) Vcc=24V, Ic=200mA V B > Bop Ileakage Vcc=24V, B < Brp uA < mA 3.0 us us Isupply Vcc=24V, Output & FG Open Output / FG Rising Tr Vcc=12V, RL=820 Time CL=20Pf Output / FG Falling Tf Vcc=12V, RL=820 Time CL=20Pf Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 Characteristics Operate Point Symbol Bop Quantity Grade A Grade B Grade C Grade A Grade B Grade C Min Release Point Hysteresis Window Brp Bop-Brp Ta= -20C to +100C Typ. 25 30 50 -70 -25 -100 -30 -120 -50 40 Unit Max 50 70 120 Gauss Gauss 200 Gauss SIP- 4L: WSH413-XPAN SOT-25: WSH413-XPDN Elec. Grade SIP-4L : 1: A Grade (50 Gauss) 2: B Grade (70 Gauss) 3: C Grade (120 Gauss) Elec. Grade N: Non-lead Process SOT-25: 1: A Grade (50 Gauss) 2: B Grade (70 Gauss) Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 SIP-4L SOT25 Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 SOT-25 Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 SIP-4L Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 WSH413 SOT-25 Figure 1. SIP-4L Figure 2. Put additional resistor between Power line and Pin 1 of WSH413 can greatly incerease the surge voltage protection ability of system. Winson reserves the right to make changes to improve reliability or manufacturability. (c)Winson, 2005/10/31 |
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