OCH2988 Driver Datasheet

OCH2988 Datasheet, PDF, Equivalent


Part Number

OCH2988

Description

500mA Single Phase Hall-Effect DC Fan Driver

Manufacture

Orient Chip

Total Page 2 Pages
Datasheet
Download OCH2988 Datasheet


OCH2988
OCH2988
500mA Single Phase Hall-Effect DC Fan Driver
General Description
The OCH2988 is an integrated Hall sensor with
H-Bridged output driver designed for brushless
DC motor applications. The device is using
HV process includes an on-chip Hall sensor for
magnetic sensing, an amplifier that amplifies the
Hall voltage, a comparator to provide switching
hysteresis for noise rejection, a bi-directional
drivers for sinking and driving large current load.
Placing the device in a variable magnetic field, if
the magnetic flux density is larger than threshold
BOP, the DO is turned to sink and DOB is turned
to drive. This output state is held until the
magnetic flux density reverses and falls below
BRP, then causes DO to be turned to drive and
DOB turned to sink.
OCH2988 is available in SIP-4L package and
is rated over the -40°C to 85°C.
Features
One-chip Solution (Hall Element + Driver)
Input Voltage Range : 3V to 20V
Continuous Output Current : 500mA
High Sensitivity Hall Sensor
BOP25GSBRP-25GS
Lock-shutdown protection & auto-restart function
Thermal Shutdown Protection
Low Output Switching Current Noise
-40to +85 Temperature Range
RoHS Compliant
Available in SIP-4L(TO94) Packages
Applications
Single Coil Design Cooling Fans
Single Coil DC Brushless Fan
Single Coil DC Brushless Motor
Office Automated Equipment
Brown-Goods
Home Applications
Car Audio Cooling Fan
Pin Configuration
(Top View)
GND
DOB
DO
VDD
SIP-4L
Figure 1, Pin Assignments of OCH2988
Pin Name
VDD
DO
DOB
GND
Pin No.
1
2
3
4
Pin Function
Positive Power Supply
Output 1
Output 2
Ground
Typical Application Circuit
VDD
Diode
OCH2988
VDD DO DOB GND
1 234
CIN=1~4.7uF
Coil
Figure 2, Typical Application Circuit of OCH2988 (SIP-4L)
Page1 - 2
Ver. 1.2, May 4, 2018
源于灿瑞 磁传天下

OCH2988
OCH2988
500mA Single Phase Hall-Effect DC Fan Driver
Ordering Information
Part Number Package Type Packing Qty BOP (Gauss) BRP(Gauss) Temperature Eco Plan Lead
OCH2988MD
SIP-4L
1000pcs/Bag 25(Typ.)
-25(Typ.) -40 ~ 85ROHS Cu
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Page2 - 2
Ver. 1.2, May 4, 2018
源于灿瑞 磁传天下


Features W W W .ORIE1OC2HN239882T-CHIP.COM OCH29 88 500mA Single Phase Hall-Effect DC Fa n Driver ◼ General Description The O CH2988 is an integrated Hall sensor wit h H-Bridged output driver designed for brushless DC motor applications. The de vice is using HV process includes an on -chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall v oltage, a comparator to provide switchi ng hysteresis for noise rejection, a bi -directional drivers for sinking and dr iving large current load. Placing the d evice in a variable magnetic field, if the magnetic flux density is larger tha n threshold BOP, the DO is turned to si nk and DOB is turned to drive. This out put state is held until the magnetic fl ux density reverses and falls below BRP , then causes DO to be turned to drive and DOB turned to sink. OCH2988 is avai lable in SIP-4L package and is rated ov er the -40°C to 85°C. ◼ Features One-chip Solution (Hall Element + Dr iver) ⚫ Input Voltage Range : 3V to 20V ⚫ Continuous Output.
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