Rechargeable Fan -- HT45FM2C + HT45FH4M

Rechargeable Fan
HT45FM2C + HT45FH4M
Characteristics
 Li-Battery ASSP MCU : HT45FH4M (Li battery charger management solution)
 Human interface : variable resistor for speed control, Li charge LED indicator
 Power Supply
◆
Adaptor – Input AC 90V ~ 240V, Output DC 12V
◆
Li battery : 2 in series (DC 6 ~ 8.4V, 2600mAh3)
 Solution
◆
◆
DC brushless BLDC control MCU

DC 3-phase DC brushless motor control

DC 12V-sensorless algorithm

6 level square wave control

Over Current Protection (OCP)

VR stepless speed control
Li battery charging management MCU

Auto detect adapter power / battery power

Battery rapid charge function

Battery protect functions (OCP / OVP / OTP)

Li Battery (7800mAh) can provide 6 hours use (800RPM speed)

Power converter efficiency up to 85%

PCBA Solution
Li Battery Interface
Motor：U, V, W
DC 12V
HT45FH4M
Human Signal
Interface
HT45FM2C
System Block Diagram
AC90V ~
AC240V
Adapter
DC12V
LDO
DC5V
DC12V
Battery
Charge and
Discharge
Circuit
Li Battery
x2
DC5V
Power
Management
MCU
(HT45FH4M)
Motor Driving
Circuit
DC5V
BLDCM
MCU
(HT45FM2C)
X3
3-phase
BLDCM
Additional
Functions
e.g : LED