WSH130 Hall Effect Sensor IC Features: Operates from 2.4V to 26V supply voltage with reverse voltage protection Operates with magnetic fields from DC to 15kHz On-chip Hall Sensor On-chip temperature compensation circuitry minimizes shifts in on and off points and hysteresis over temperature and supply voltage Ideal sensor for speed measurement, revolution counting, positioning, and DC brushless motors Specifications : Switching type: latch or non-latch type (S pole) Latch: On(L) with magnetic South pole and Off (H) with North pole Non-Latch: On (L) with magnetic South pole and Off(H) without magnetic field Functional Description : WSH130 is designed to integrate Hall sensor with output driver 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 and a open-collector output driver capable of sinking up to 20mA current load. An on-chip protection resistor is implemented to prevent reverse power fault. 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. WSH130 are rated for operation over temperature range from –40˚ C to 125 ˚C and voltage ranges from 2.4V to 26V. Pin Descriptions: Name P/I/O Vdd P Gnd O Vout O Pin# 1 2 3 Description Positive Power Supply Ground Output Pin Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2005/8/25 WSH130 Absolute Maximum Rating (at Ta=25˚ C) Supply Voltage Vcc -------------------------Output breakdown Voltage Vout(breakdown) ---------------Magnetic flux density B Reverse Protection Voltage Vr Output ON Current (continuous) Ic Operating Temperature Range Storage Temperature Range Package Power Dissipation ---------------------------------------------------------------------------- Ta -------------------------Ts -------------------------Pd -------------------------- 26V 30V Unlimited 26V 25mA (-40˚C to +125˚C) (-65˚C to +150˚C) 500mw Electrical Characteristics: (T=+25˚C, Vcc=2.4V to 26V) Characteristic Symbol Test Conditions Min Typ Max Units Supply Voltage Vcc V ─ 2.4 ─ 26 Output Saturation Vout Vcc=12V,Ic=10mA ─ V 0.4 0.7 Voltage (sat) B > Bop Output Leakage Ileakage Vcc=12V, B<Brp UA ─ <0.1 10 Current Supply Current Isupply Vcc=12V,Output mA ─ 4.0 8 Open Output Rise Time Tr Vcc=12V,RL=2K 1.0 Us ─ 10 Ω CL=20Pf Output Falling Time Tf Vcc=12V,RL=2K Us ─ 0.3 1.5 Ω CL=20Pf Function Block: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2005/8/25 WSH130 Magnetic Characteristics: Characteristic Symbol Grade Operating Point Bop Min. Typ. Max. Unit A + 30 + 50 Guass B + 50 +70 Guass + 150 Guass NL Release Point Hysteresis Window Brp Bhys A -50 - 30 Guass B -70 -50 Guass NL 0 Guass 30 200 Ordering Information: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2005/8/25 Guass WSH130 Package Information: SOT23: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2005/8/25 WSH130 Application Circuit: Fan Application: Magnetic detector: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2005/8/25