Document
Datasheet
DC Brushless Fan Motor Drivers
Multifunction Single-phase Full-wave Fan Motor Driver
BD6722FS
●General description
BD6722FS is a half pre-driver that controls the source side motor drive part composed of the power transistors. Moreover, it corresponds to 800mA motor, because the driving current and the composition parts are optimized.
●Package SSOP-A16
W (Typ.) x D (Typ.) x H (Max.) 6.60mm x 6.20mm x 1.71mm
●Features
Half pre-driver including power NDMOS FET Speed controllable by DC / direct PWM input PWM soft switching Quick start Current limit Lock protection and automatic restart Rotation speed pulse signal (FG) output Lock alarm signal (AL) output
SSOP-A16
●Application Fan motors for general consumer equipment of desktop PC, and Server, etc.
●Absolute maximum ratings
Parameter
Symbol
Limit
Supply voltage Power dissipation
Vcc 20 Pd 812.5 *1
Operating temperature range
Topr –40 to +100
Storage temperature range
Tstg –55 to +150
High side output voltage
Voh 34
Low side output voltage Low side output current
Vol 34 Iol 1.5 *2
Rotation speed pulse signal (FG) output voltage
Vfg
20
Rotation speed pulse signal (FG) output current
Ifg
10
Lock alarm signal (AL) output voltage
Val 20
Lock alarm signal (AL) output current
Ial 10
Reference voltage (REF) output current
Iref
8
Input voltage (TH)
Vin 15
Junction temperature
Tj 150
*1 Reduce by 6.5mW/°C over Ta=25°C. (On 70.0mm×70.0mm×1.6mm glass epoxy board) *2 This value is not to exceed Pd.
Unit V
mW °C °C V V A V mA V mA mA V °C
●Recommended operating conditions Parameter
Operating supply voltage range Operating input voltage range (H+, H–, MIN) (more than Vcc=9V) Operating input voltage range (H+, H–, MIN) (less than Vcc=9V)
Symbol Vcc
Vin
Limit 4.5 to 17.0
0 to 7
0 to Vcc–2
Unit V V
V
○Product structure:Silicon monolithic integrated circuit
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○This product is not designed protection against radioactive rays
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TSZ02201-0H1H0B100180-1-2 28.JUL.2012 Rev.002
BD6722FS
Datasheet
●Pin configuration
GND OSC MIN
TH Vcc A1H A1L RNF
1 2 3 4 5 6 7 8
(TOP VIEW)
16 AL 15 FG 14 REF 13 H– 12 H+ 11 CS 10 A2H 9 A2L
Fig.1 Pin configuration
●Block diagram
●Pin description P/No. T/Name 1 GND
2 OSC
3 MIN 4 TH 5 Vcc 6 A1H 7 A1L
8 RNF
9 A2L 10 A2H 11 CS 12 H+ 13 H– 14 REF 15 FG 16 AL
Function Ground terminal (signal ground) Oscillating capacitor connecting terminal Minimum output duty setting terminal Output duty controllable input terminal Power supply terminal High side output terminal 1 Low side output terminal 1 Output current detecting resistor connecting terminal (motor ground) Low side output terminal 2 High side output terminal 2 Output current detection terminal Hall + input terminal Hall – input terminal Reference voltage output terminal Speed pulse signal output terminal Lock alarm signal output terminal
1 GND
TSD
PWM SOFT SWITCHING
SIGNAL OUTPUT
AL 16.