TA8473FN Datasheet | Toshiba

FEATURES z Built- in automatic self rotation recovery circuit after release of motor locking. z Thermal shutdown circuit incorporated. z Operating voltage : 6~13.8 V z 2 kind of speed of full- speed and half- speed are variable according to ambient temperature. z Speed change point temperature is externally settable. TA8473FN/FNG TA8473FG/FNG: The TA8473FG/FNG is a Pb-free product. The following conditions apply to solderability: - Solderability 1. Use of Sn-37Pb solder bath - solder bath temperature = 230°C - dipping time = 5 seconds - number of times = once - use of R-type flux 2. Use of Sn-3.0Ag-0.5Cu solder bath - solder bath temperature = 245°C - dipping time = 5 seconds - the number of times = once - use of R-type flux Weight: SSOP16-P-225-1.00A: 0.14g (Typ.) SSOP16-P-225-0.65B: 0.07g (Typ.) 2006-3-2 TA8473F/FG/FN/FNG BLOCK DIAGRAM .. PIN FUNCTION PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL VCC B1 OUT1 GND GND OUT2 B2 TH RD FG SC HS Rref H H - + FUNCTIONAL DESCRIPTION Power voltage supply terminal. Noise reduction capacitor connection terminal. Output terminal. GND terminal. GND terminal. Output terminal. Noise reduction capacitor connection terminal. Thermistor connection terminal. Rotation detect output terminal. Rotation speed output terminal. Lock protect time constant determined terminal. Half- speed determined terminal. Reference resistor connection terminal. Hall input terminal. Hall input terminal. Non connection. 2006-3-2 TA8473F/FG/FN/FNG HALF- SPEED SYSTEM To lower the motor speed, TA8473F/FG and TA8473FN/FNG set the off- time during the output timings (Fig.1). Starting the multivibrator (MMV) enables the off- time. The off- time is set by the time constant of capacitor Ch connected to the HS terminal and IC internal resistor Rh. A thermistor can also be used to control off- time depending on the temperature. (1) Determining Ch The MMV operation can be monitored through the HS terminal. About 100 kΩ Rh is connected between VCC and HS,...