FAN8702 Fairchild Semiconductor, FAN8702 Datasheet - Page 12

• Manufacturer Part Number: FAN8702
• Description: Motor / Motion / Ignition Controllers & Drivers 6CH Motor Drive IC
• Manufacturer: Fairchild Semiconductor
• Type: 6 Channel DSC Motor Driverr

Specifications of FAN8702

• Operating Supply Voltage: 2.2 V to 6.5 V
• Supply Current: 25 mA
• Mounting Style: SMD/SMT
• Package / Case: LQFP-48
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FAN8702/FAN8702B/FAN8702MP
Application Information
1. Current Drive Output Current Setting
Motor current is determined by ISH/IAE voltage and Rs sensing resistance and calculated by the formula below considering
Rw. Generally internal bonding and metal resistance Rw is around 0.05
2. Current Drive Block1(CH5)
If there is no capacitor on the exterior of the FC terminal or low capacitance is used, it may cause oscillation or overshoot at
output terminal. The output stage will not be operating until FC1 terminal voltage reaches around 0.7V (Typical)
The output response time depends on the FC1 capacitance and interval of Input signal. Generally, the quick charging time is
10us~20us. To minimize the delay time difference in the output response between high-speed shutter and bulb shutter a quick
charging circuit is built in.
12
IN9~10
VREF
ISH
Motor Current
ISH / IAE
IN9~12
Quick Charge
Reference
VREF
Out
Ciruit
Reference
Out
=
FC1
ISH or IAE Input Voltage
-----------------------------------------------------------------
FC
H-BRIDGE5
R
VCC1
H-BRIDGE
S
VCC1
+
5,6
.
R F G 1
VCC2
R
RFG
RW
RS
R s
Rw
W
OUT_B
OUT_A
OUT10
OUT9
M
S H