Data Sheet
PT8A2703/2713
Cost Down Shaver Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Product Features
•
•
•
•
•
•
•
•
•
On-chip analog functions for rechargeable battery
charge/discharge management.
Constant and pulse current charging operations
Fast charge detection by: -∆V, 0∆V,
Charge protection with safety timer 90 minutes,
maximum voltage, maximum temperature.
On-chip voltage reference and regulator.
On-chip high precision 5-bits ADC.
Cord existence detection and indicator
Low
Battery detection and indicator
Few external components needed
Product Description
PT8A2703 is designed as a mixed signal device to
provide a single chip solution for rechargeable battery
powered smart controllers using only a few external
components such as transistors, passive components and
LED. The chip handles charging with fast constant or
pulse current charging modes and discharging. It
contains enough logic circuits on chip to implement
custom applications such as clipper, hair remover, high-
end toy/aeromodelling and other portable devices.
Ordering Information
Part Number
PT8A2703DE
PT8A2703W
PT8A2703WE
PT8A2713S
Package
Die Form
16-Pin SOIC
16-Pin SOIC
20-Pin SOIC
Block Diagram
MODE[1:0]
Operation Mode
and Switch
Selection
Test Mode
Selection
Input control
Charge Control logic
MOTOR
CHARGE
BUZOUT
LED0
LED1
POR
TESTSEL
ON/OFF
VSEL
VB
VB2
VT
OSC
Oscillator
5-bit ADC
VEE
Voltage
Re gulator
GND
VCC
PT0162(03/05)
1
Ver:1
Data Sheet
PT8A2703/2713
Cost Down Shaver Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin assignment
PT8A2703W
16-Pin SOIC
V
CC
LED0
LED1
V
EE
G
ND
V
B
V
B2
V
T
1
2
3
4
5
6
7
8
16 CHARGE
15 MODE0
14 MODE1
13 CORD
12 ON/OFF
11 TESTSEL
10
9
OSC
V
SEL
PT8A2713S
20-Pin SOIC
V
CC
BUZOUT
LED0
LED1
V
EE
V
INP
G
ND
V
B
V
B2
V
T
1
2
3
4
5
6
7
8
9
10
20 NC
19 CHARGE
18 MOTOR
17 MODE0
16 MODE1
15 CORD
14 ON/OFF
13 TESTSEL
12 OSC
SEL
11 V
Pad Location
1850um
BUZ OUT
LED0
AVDD
DVDD
CHARGE MOTOR
MODE0
MODE1
1690um
LED1
CORD
VEE
ON/OFF
TESTSEL
AGND DGND
VB
VB2
VT
VSEL
OSC
VINP
DIE NO.
Pad Name
DVDD
AVDD
BUZOUT
LED0
LED1
VEE
VINP
AGND
DGND
VB
VB2
X Coordinate
808.5
520.1
264.7
155.4
155.4
155.4
155.35
560.05
663.95
820.95
924.85
Pad Coordinates
Y Coordinate
Pad Name
1534.45
VT
1534.45
VSEL
1534.45
OSC
1298.3
TESTSEL
ON/OFF
1038.7
750.3
CORD
395.1
MODE1
166.05
MODE0
MOTOR
166.05
166.05
CHARGE
166.05
Note:
Substrate is connected to GND
X Coordinate
1081.85
1185.75
1351.15
1688.05
1688.05
1688.05
1688.05
1607.7
1352.3
1063.9
Y Coordinate
166.05
166.05
166.05
478.35
733.75
1022.15
1277.55
1534.45
1534.45
1534.45
PT0162(03/05)
2
Ver:1
Data Sheet
PT8A2703/2713
Cost Down Shaver Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pad/Pin Description
Pin #
2703W
1
-
2
3
4
-
5
6
7
8
2713S
1
2
3
4
5
6
7
8
9
10
Pin/Pad Name
VCC(DVDD,AVDD)
BUZOUT
LED0
LED1
VEE
VINP
GND (AGND,DGND)
VB
VB2
VT
I/O
-
O
O
O
O
I
-
I
I
I
Pad/Pin Descriptions
Positive supply voltage from battery
Buzzer output, active low.
Low battery indicator LED output, active low.
Corded Mode/Charging indicator LED output, active low.
Internal regulator output (about 2.0V)
Positive input terminal of regulator opamp
Power ground
Divided input of Battery voltage (range from 1.6V to 1.8V)
Low battery voltage detection channel (range from 1.6V to 1.8V)
Battery temperature NTC voltage (range from 1.6V to 1.8V)
Zero/negative delta voltage duration selection
<0.825VEE : 3min (NiCd)/ 10min (NiMH)
9
11
VSEL
I
<0.850VEE and >0.825VEE: 1min (NiCd)/ 6min (NiMH)
<0.875VEE and >0.850VEE: 2min (NiCd)/ 8min (NiMH)
>0.875VEE: 4min (NiCd)/ 12min (NiMH)
10
12
OSC
I
Connected to an RC network for the internal system clock, 64kHz
11
13
TESTSEL
I
Test mode select, internal pull up.
12
14
ON/OFF
I
Motor On/Off key
13
15
CORD
I
External cord detection (digital level), , active high
14
16
MODE1
I
0 : zero delta voltage detection; 1 : negative delta voltage detection
15
17
MODE0
I
0 : Tact switch; 1 : Slide switch mode
-
18
MOTOR
O
Drive motor switch enable (active low)
16
19
CHARGE
O
Battery charge control signal to drive NPN switch for charging
-
20
NC
-
No connection
Notes :
All LED signals are active low with negative pulse trains
PT0162(03/05)
3
Ver:1
Data Sheet
PT8A2703/2713
Cost Down Shaver Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Functional Description
5-bit ADC:
On-chip high precision 5-bit ADC to sample the data of Battery voltage and temperature.
Voltage Regulator (2.0V Regulator):
Build-in voltage regulator used to power supply RC oscillator and 5-bit ADC.
Oscillator:
Internal RC oscillator to generate a 64KHz system oscillator.
POR:
Power on reset to reset all internal logic
Operation Mode and Switch selection
Operation Mode selection to select different fast charging detection methods by setting MODE1, including 0∆V detection and -∆V
detection approach. Switch selection to select the usage of tact or slide switch by setting MODE0. Table 2 is the relationship
between operation mode and fast charging detection method as well as relationship between MODE0 and switch type
Table 2
MODE1
0
1
Fast charging detection method
0∆V detection
-∆V detection
MODE0
0
1
Switch type
Tact switch
slide switch
Switch operation with ON/OFF
ON/OFF is a Tact Switch or Slide Switch input. ON/OFF acts as active high input for slide switch and active low for tact switch.
For 2703, only slide switch mode is supported.
LED display
The LED1 indicates corded mode/charging . The LED0 indicates low battery voltage.
Charging and Motor control
Cord Mode and Motor off
Constant Current Charging and Motor off
Before full charged, battery will be fast charged with 1C constant current, The LED1 always lights during this period.
Pulse Current Charging and Motor off
Once battery voltage experiences zero delta V or negative delta V according to the selection of fast charging detection approach,
The LED1 indicator flashes at the frequency of 1Hz (0.5s ON, 0.5s OFF). At the same time, Charging operation transfers to pulse
Current Charging.
Battery charge operation will drop to pulse current charging if the temperature of battery exceeds preset temperature by VT pin.
The LED1 indicator flashes at a frequency of 1Hz (0.5 s ON, 0.5 s OFF).
During pulse current charging, charge pulses output at charge pin run about at the rate of 12.5Hz with duty cycle of 10%.
PT0162(03/05)
4
Ver:1
Data Sheet
PT8A2703/2713
Cost Down Shaver Controller
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Zero delta V detection
10 minute s
Vmax
Ne gative delta V detection
Vmax
3 minutes
12mV
t
t
CORD
CHARGE
LED1
negative pulse trains
Cord mode
Cordless mode CORD
10% duty cycle
CHARGE
LED1
Cord mode
Cordless mode
0.5s
0.5s
0.5s
0.5s
Fig 4 Two approaches for fast charging termination
Temperature to terminate charging:
Charging stops immediately if temperature of Battery exceeds maximum preset
temperature value. Pulse charge continues when temperature drops below a lower preset temperature value. Once over-
temperature condition, the two led indicators turn off right away.
Corded Mode and Motor on
When ON/OFF is triggered to turn on the Motor during Cord Mode, MOTOR output low to drive Motor.
When ON/OFF is triggered to turn off the Motor during Cord Mode, Shaver switches immediately to “Charging operation”.
When CORD removed during Corded Mode, Shaver switches to “Cordless Mode” operation.
The LED1 indicator is always on during Cord Mode. The LED0 indicator is on if Battery voltage is lower than a preset voltage
value at VB2 pin. In contrary, the LED0 indicator is off if Battery voltage is normal.
Cordless Mode and Motor on or off
When CORD is removed (Cordless Mode) and Motor off, the LED1indicator is off immediately. The LED0 indicator is on for 7
seconds if Battery voltage is over low. In contrary, the LED0 indicator is off if Battery voltage is normal.
Once motor on during Cordless Mode, the LED1 indicator is off.
If motor off during Cordless Mode, the LED0 indicator is on for 7 seconds if Battery voltage is over low. In contrary, the
LED0 indicator is off if Battery voltage is normal.
Low Battery
If Battery voltage is below or equal a preset voltage value at the VB2, the LED0 indicator is on to show low battery, the Motor
will turn off. In contrary, the LED0 indicator is off if Battery voltage is normal.
PT0162(03/05)
5
Ver:1
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
