TC266 双线圈霍尔驱动芯片规格书.pdf

TC266 Two-Coil Fan Driver Data Sheet Rev. 1.2 1. General Descriptions TC266 is an output driver for two-coil BLDC fan or motor and a Hall sensor is integrated in. Beside the magnetic sensor, the device includes an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis, two complementary open-drain drivers. It also includes an over-temp protector and chopper modulator which enhances the magnetic performance. Placing the device in a variable magnetic field, if the magnetic flux density is larger than Bop, pin DO will be turned on (low) and pin DOB will be turned off (high). This output state is held until the magnetic flux density reverses and falls below Brp, then causes DO to be turned off (high) and DOB to be turned on (low). Features □ On Chip Hall Sensor □ 3.5~28V Supply Voltage □ 1.5mA Operating Current □ 300mA(Average) Output Sink Current □ Embedded Clamp Diodes at Outputs □ Ambient Temp Range:-40C~85C □ Embedded Over-Temp Protector □ TO-94 (SIP-4L) Package Typical Applications □ BLDC Fan □ BLDC Motor □ Revolution Counting □ Speed Measurement Package □ TO94 TC266 Datasheet Rev 1.2 Pin Description TC266 Figure 1: Package and Pin Table 1：Pin Description No Pin Description 1 VDD Power Supply 2