99W031A High reliability 2-phase half-wave motor pre-driver BA6409F Description Dimension (Units : mm) The BA6409F is a two-phase half-wave motor predriver for fan motors. The built-in protection diode eliminates an external diode and the concern of connecting in reverse when fan motors equipped. The device also has a lock-up detector and automatic restart function. There is a lock-up detector output pin on the IC. Features 1) Built-in discrete diode for reverse connection protection. (Maximum reverse connection protection voltage: 80V) 2) Lock-up detector function & lock-up detector output pin. 3) Compact SOP8-pin package. Fewer external components make mounting spaces smaller. 4) Automatic restart when lock-up is removed. 5) Hall element input hysteresis circuit is built-in. SOP8 Applications Two-phase half-wave motor pre-driver for fan motor Absolute Maximum Ratings (Ta=25˚C) Parameter Applied voltage Power dissipation Symbol Limits Unit VCC 30 550 * mW V Operating temperature Pd Topr Storage temperature Tstg –30 ~ +75 –55 ~ +125 ˚C Output current IOMAX 70 mA Junction temperature Tjmax 125 ˚C ˚C *Derating : 5.5mW/˚C for operation above Ta=25˚C (Mounted on a 70.0mm¥70.0mm¥1.6mm glass epoxy PCB.) 1999 5 22 Recommended Operating Conditions (Ta=25˚C) Symbol Min. Typ. Max. Unit Supply voltage VCC 5.2 — 28 V Input voltage * VBH 1.0 — Vcc-1.7 V Parameter *Input voltage includes signal amplitude. Electrical Characteristics (Unless otherwise noted, Ta=25 ˚C , Vcc=12V) Parameter Symbol Min. Typ. Max. Unit Circuit current Hall amplifier input hysteresis (+) ICC — 3.2 5.0 mA Output off Vhya+ +3 — +15 mV VB=6V (Voltage on Pin2 with respect to Pin4) –3 Pin3 "L"output voltage Vhya– V3L — — –15 0.5 mV V VB=6V (Voltage on Pin2 with respect to Pin4) I3L=5.0mA Pin3 current capacity I3 — — mA V3L=2.0V Hall amplifier input hysteresis (–) — 8.0 Conditions Pin6 charge current I6C 2.0 3.45 5.25 µA V6PIN=1.5V Pin6 discharge current I6d 0.35 0.80 1.45 µA V6PIN=1.5V Pin6 charge/discharge current ratio rcd 3 4.5 8 — I6c/I6d Pin6 clamp voltage V6cL 2.2 2.6 3.0 V Pin6 comparater voltage V6cp 0.4 0.6 V Pin7 "H"output voltage Pin8 "H"output voltage V7H V8H 8.8 8.8 9.8 9.8 0.8 — V V — Io=10mA Io=10mA * The products described herein are not designed to be X ray proof. Application circuit Vcc 8 7 6 5 AUTOMATIC RESET CIRCUIT LOGIC LOCK DETECTION Hall AMP REGULATOR 1 2 3 HALL ELEMENT 4