PT8A2718 Datasheet PDF - Pericom Semiconductor
| Part Number | PT8A2718 | |
| Description | Charger Controller | |
| Manufacturers | Pericom Semiconductor | |
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There is a preview and PT8A2718 download ( pdf file ) link at the bottom of this page. Total 26 Pages | ||
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PT8A2707-12/17-19
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Charger Controller with Fuel-Guage & LCD/LED Display
Product Features
2-3 cells, NiCd or NiMH battery fast-charger controller for battery-embedded devices
Precise 7-bit fuel-gauge-counter measures charging and discharging current through battery pack. Make it possible
to accurately indicate battery capacity through LCD (PT8A2707-09/2717-19) or LEDs (PT8A2710-12).
Integrated with a DC/DC step-down controller make it possible for customers to manufacture just one
PCB module that can:
Cover different product models that requires different charging current/speed by changing only one resistor;
Work with different kinds of AC/DC adapters with wide input voltage ranges.
Motor also can work in both corded or cordless conditions. When motor is used in cord-mode, the
charging current to battery is regulated at a maximum value of 1/10 of the fast-charging current. The
battery is just like being slowly-charged and prevented from being exposed to a prolonged high-current
charging profile.
Provide excellent charge and discharge protections.
Available with different parts to cover products employing slide switch (PT8A2707/10/17), tact switch
(PT8A2708/09/11/12/18/19) input to control motor ON/OFF. Two-step motor-speed control (70%, 100%) is also
available in PT8A2708/2711/2718.
Very low standby current of typical 20A. Products could typically work in standby-mode for a few months,
depends on battery capacity.
Technology Highlights
Employing 5 major charging states: cool-down / pre-charge / fast charge / trickle charge / stop charge, taking the
best care for different battery conditions, especially for aged or dry batteries
Excellent battery protection and full-charge detection schemes
Negative delta voltage detection (-ΔV) with precision of +/-1mV step
Maximum battery voltage detection to turn to maintenance
Rate of change of temperature detection (dT/dt) best for NiMH batteries full-charge termination (use with
NTC)
Abnormal high battery temperature (55C) detection to stop charging (use with NTC)
Flexible fast charge time-out setting (30mins/60mins/90mins/150mins)
Fuel-gauge counter takes into account the battery self-discharge compensation based on time.
Provide excellent battery over-discharge protection through auto-stop motor at once (<0.2s) when
discharging current is higher than preset limit value for 3sec (3 limit values selectable externally)
battery pack voltage is lower than No-Power value (adjustable externally)
NTC measures battery pack temperature higher than preset high-temp value(adjustable externally)
Key delay to reject multiple inputs at Tact switch (about 0.125s ignorance).
Internal voltage regulator provides better rejection to interference.
Integrated DC/DC step-down controller to regulate constant charging currents at different charging
Available with 24-pin SOIC and SSOP lead-free package
12-07-0005
PT0268-1 07/05/12
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PT8A2707-12/17-19
Charger Controller
with Fuel-Guage & LCD/LED Display
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CHARGE 1
CORD 2
TEST 3
L100 4
L80 5
L60 6
L40 7
L20 8
NA 9
BLI 10
GND 11
MOTOR 12
24 VMSTOP
23 ISENDC
22 ISENFG
21 ISENCOM
20 CC
19 VDD
18 TIMER
17 VEE
16 VT
15 VBLOW
14 VB
13 SLIDE
PT8A2710 pins assignment
CHARGE 1
CORD 2
TEST 3
L100 4
L80 5
L60 6
L40 7
L20 8
LTURBO 9
BLI 10
GND 11
MOTOR 12
24 VMSTOP
23 ISENDC
22 ISENFG
21 ISENCOM
20 CC
19 VDD
18 TIMER
17 VEE
16 VT
15 VBLOW
14 VB
13 DSTACT
PT8A2711 pins assignment
CHARGE 1
CORD 2
TEST 3
L100 4
L80 5
L60 6
L40 7
L20 8
NA 9
BLI 10
GND 11
MOTOR 12
24 VMSTOP
23 ISENDC
22 ISENFG
21 ISENCOM
20 CC
19 VDD
18 TIMER
17 VEE
16 VT
15 VBLOW
14 VB
13 TACT
PT8A2712 pins assignment
PIN I/O
1O
2I
3I
4O
5O
6O
7O
8O
9O
10 O
11 -
12 I/O
13 I
14 I
15 I
16 I
17 O
18 O
19 -
20 I/O
21 I
22 I
23 I
24 I
Name
CHARGE
CORD
TEST
L100
L80
L60
L40
L20
NA
LTURBO
BLI
GND
MOTOR
SLIDE
DSTACT
TACT
VB
VBLOW
VT
VEE
TIMER
VDD
CC
ISENCOM
ISENFG
ISENDC
VMSTOP
Table 2: PT8A2710-2712 LED Pattern Pin Description
Descriptions
PWM DC/DC controller output for constant current regulation
External DC supply existence detection
Quick test mode
Fuel gauge output (Remaining 100% capacity, full charge indication)
Fuel gauge output (Remaining 80% capacity)
Fuel gauge output (Remaining 60% capacity)
Fuel gauge output (Remaining 40% capacity)
Fuel gauge output (Remaining 20% capacity)
NA for PT8A2710/12
Motor “Turbo-Mode” Indicator (PT8A2711)[Normal speed, OFF]
Battery-low output (Remaining <10% capacity)
Ground
Motor driver control
Slide switch (PT8A2710) input to control motor running
Tact switch (PT8A2711) input to control motor running with dual speeds
Tact switch (PT8A2712) input to control motor running
Charging battery voltage sense input
Low-battery voltage sense input
Temperature sensor (NTC) input
Regulated output voltage
Charging protection timer (1hr/1.5hrs/2.5hrs/4hrs)
Supply voltage
Compensation capacitor for DC/DC converter
Current sense reference plane
Fuel gauge current sense input
DC/DC controller current sense input
Pin Config
Current Limit
Motor stop current limit value GND
4.2x charging current
select input
0.6-1.0V
5x charging current
VDD
3x charging current
12-07-0005
PT0268-1 07/05/12
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for PT8A2718 electronic component. |
| Information | Total 26 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PT8A2718.PDF Datasheet ] | |
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