lb1962 Unisonic Technologies, lb1962 Datasheet - Page 4

• Manufacturer Part Number: lb1962
• Description: Single-phase Full-wave Motor
• Manufacturer: Unisonic Technologies

UTC LB1962
DESIGN REFERENCE
(1) V
(2) OUT1, OUT2 pins
regenerates kickback current between lower side NPN outputs if a diode is used for protection against reverse
connection.
(3) IN
(typ.). The Hall signal amplitude should be 70 mV or more.
(4) CT pin
motor is locked. Once normal motor rotating condition is restored, the automatic recovery circuit will reset itself.
(6) FG pin
(7) ST pin and HB pin
(8) Thermal protection circuit
damage.
UTC
www.unisonic.com
Power supply pin for whole I
Single-phase coil output pins.
Bipolar forward or reverse drive output determined by OUT1 or OUT2 high. Built-in regenerative circuit that
Hall signal input pins
The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of ±3.5 mV
This pin serves timing capacitor connecting pin between CT and GND.
The capacitor determines timing of the built-in lockup protection circuit for preventing coil burnout when
Open-collector output pin for rotation frequency detection.
When IN
When IN
ST pin: When input to this pin is High, motor drive is stopped (OUT is high impedance).
HB pin: Hall bias switching pin. At ST pin High input, Hall bias is switched to reduce current drain in fan standby
When junction temperature Tj of IC is or over about 150℃, output current limiter is activated to protect against
If not used, both pins should be open.
Adjusting the capacitance alters the lockup detection time.
CC
When a 0.47 mF capacitor is connected between CT and GND
Connecting this pin to ground when lockup function is not used
–
, IN
Lockup detection time
Lockup protection time/automatic recovery time
mode.
pin
+
pins
–
–
= High and IN
= Low and IN
UNISONIC TECHNOLOGIES CO., LTD.
+
+
= High, then FG = High
= Low, then FG = Low
C
.
LINEAR INTEGRATED CIRCUIT
:approx. 0.5s
:approx. 1s (output OFF)
:approx. 0.16s (output ON)
QW-R109-017,A
4