BA6908F
BA6908F is Single-phase full-wave motor driver for fan motor manufactured by ROHM.
Motor driver ICs
Single-phase full-wave motor driver for fan motor
BA6908F is a single phase full-wave motor driver for fan motor corresponding to 5V and 12V. Switching noise is reduced by soft switching drive. This IC has lock detection and automatic restart functions as motor protection function. z Applications Motor drivers for fan motors z Features 1) Single-phase full-wave drive system. 2) Built-in power transistor. 3) Soft switching drive. 4) Lock detection and automatic restart circuit. 5) Thermal shut-down circuit. 6) Hall signal output. z Absolute maximum ratings (Ta=25°C)
Parameter Supply voltage Power dissipation Operating temperature Storage temperature Output current Hall signal output current Output voltage Hall signal output voltage Junction temperature Symbol VCC Pd Topr Tstg IOUT IHO VOUT VHO Tjmax Limits 15 687
∗1
Unit V m W
- 40 to +85
- 55 to +150 0.7 15 15 15 150
∗2
°C °C
A m A V V
°C
∗1 To use at temperature above Ta=25°C reduce 5.5m W/°C. (On 70.0mm×70.0mm×1.6mm glass epoxy board) ∗2 This value is not to be over Pd and ASO. z Remended operating conditions (Ta=25°C)
Parameter Supply voltage Symbol VCC Min. 3 Typ.
- Max. 14 Unit V
1/7
Motor driver ICs z Block diagram
LOCK DETECTION AND AUTO RESTART
Control
HALL AMP
5 z Terminal function table
Pin No. 1 2 3 4 5 6 7 8 Pin name OUT2 HO LD VCC H+ H- OUT1 GND Output terminal 2 Hall signal output terminal Connection terminal of capacitor for lock detection, auto restart Power supply terminal Hall signal input terminal + Hall signal input terminal
- Output teminal 1 GROUND terminal Function
2/7
Motor driver ICs z Input / output circuit <Hall input>
H+ H-
Fig.1
<Coil output>
<HO output>
OUT1
OUT2
Fig.2...
