WSH520 Low voltage Single Coil Hall Effect IC with Complementary Output Drivers Features: Operate from 1.8V to 4.5V supply voltage. On-chip Hall sensor. Internal thermal compensation circuit enable operation in a wide range temperature without loss of sensitivity. Output sinking capability up to 200mA for driving large load. Available in rugged low profile SOT-25 packages. General Description: WSH520 is designed to integrate Hall sensor with complementary output drivers on the same chip, it is suitable for single coil DC brushless motors. It includes a temperature compensated circuit, a differential amplifier, a Hysteresis controller, complementary bi-direction drivers for sinking and driving large current load. WSH520 are rated for operation over temperature range from –20˚ C to 75˚C and voltage ranges from 1.8V to 4.5V. Pin Descriptions: (SOT-25) Name P/I/O Pin# Vcc P 1 Vss P 2 DO O 3 DOB O 4 Description Positive Power Supply Ground Output Pin #2 Output Pin #1 Absolute Maximum Rating (at Ta=25˚ C) Supply Voltage Vcc -------------------------Magnetic flux density B -------------------------Output ON Current (continuous) Ic -------------------------- 5V Unlimited 220mA Operating Temperature Range Storage Temperature Range Package Power Dissipation (-20˚C to +75˚C) (-65˚C to +150˚C) 350mw for SOT-25 Ta -------------------------Ts -------------------------Pd -------------------------- Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003 WSH520 Electrical Characteristics: (T=+25˚C, Vcc=1.8V to 4.5V) Characteristic Symbol Test Conditions Min Typ Max Units Supply Voltage Vcc V ― 1.8 ― 4.5 Output Saturation Vout(sat) Vcc=3V, Io=150mA V ― 0.6 1.0 Vdrive+Vsink Voltage Output Leakage Ileakage Vcc=3V, B < Brp uA ― <0.1 10 Current Supply Current Isupply Vcc=3V, Io=150mA mA ― 10 20 Function Block: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003 WSH520 Magnetic Characteristics: Characteristics Symbol Quantity Operate Point Bop Grade A Grade B Release Point Brp Grade A Grade B Hysteresis Window Min Ta= -20˚C to +80˚C Typ. Max 35 50 -70 -100 Bop-Brp Gauss 70 150 Gauss Elec. Grade SOT-25: 1: A Grade (70 Gauss) 2: B Grade (100 Gauss) Test Circuit: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003 70 100 Gauss -35 -50 Ordering Information: SOT-25: WSH520-XPD□ Unit WSH520 1. SOT-25: Package Information: 1. SOT-25 Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003 WSH520 Application Circuit: 1-1. SOT-25 Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003 WSH520 Figure 1. 1-2. SOT-25 Figure 2. IV-Curve Isupply vs Operation Voltage 25 20 15 mA Isupply 10 5 0 2 2.5 3 3.5 4 Operation Voltage Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, April.2003