User's Manual

FreeWings Technologies Co., Ltd
Page 8 of 11
FW3817-30 Bluetooth Audio Module Datasheet V1.5
7.4 Battery Charger
FW3817-30 module provides two kinds of battery charger controls.
The internal charger circuit can provide up to 200mA of charger circuit.
The module controls an external pass transistor which can provide 500mA of charger circuit.
7.5 USB
USB_P and USB_N can be used to updating software or USB audio.Both of them request that VCHG pin must
be supplied 5V power.The two data signals do not need any resistance or capacitance.
7.6 Absolute Maximum Ratings
Rating Minimum Maximum Unit
Storage Temperature -40 85
℃
Supply Voltage
VCHG -0.4 5.75 V
LEDs -0.4 4.4 V
VBAT SENSE -0.4 4.4 V
VREG_EN -0.4 4.4 V
VBAT -0.4 4.4 V
7.7 Recommended Operating Conditions
Rating Minimum Typical Maximum Unit
Operating Temperature -20 20 70
℃
Supply Voltage
VCHG 4.75 5.00 5.75 V
LEDs 1.10 3.70 4.30 V
PIO 1.50 1.80 1.90 V
VBAT SENSE 0 3.70 4.25 V
VREN_EN 2.80 3.70 4.25 V
VBAT 2.80 3.70 4.25 V
7.8 Power consumption
Status Current Typical Unit
Power off VBAT 0.1 uA
A2DP slave mode with no load and playing
peak noise
VBAT 12 mA
A2DP slave mode with two16ohm speakers and
playing peak noise
VBAT 24 mA
Pause in A2DP slave mode connection VBAT 0.5 mA