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  Microchip Technology Semiconductor Electronic Components Datasheet  

PS402-01XX Datasheet

Single Chip Battery Manager

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PS402-01XX
Single Chip Battery Manager - Nickel Chemistries
Features
• Single chip solution for rechargeable battery
management
• Embedded Microchip patented Accuron™
technology provides precise capacity reporting
(within 1%) for all rechargeable battery
chemistries
• User configurable and "learned" parameters
stored in on-chip 128 x 8 EEPROM; fully field
re-programmable via SMBus interface
• Integrating sigma-delta A/D converter accurately
measures:
- Current through sense resistor (15-bits)
- High voltage (18V) battery cells directly
connected to pack voltage input (11-bits)
- Temperature measurement from on-chip
sensor or optional external thermistor
(11-bits)
• Integrated precision silicon time base
• Eight individually programmable input/output pins
that can be assigned as
- Charge control I/O
- Safety function I/O
- SOC LED output drive pins
- General purpose I/O
• Full SMBus v1.1 2-wire host interface
• Microchip firmware in 12 Kbytes of customizable
on-chip OTP EPROM
Pin Description
VDDD
GPIO(4)
GPIO(5)
GPIO(6)
GPIO(7)
SMB-CLK
SMB-DTA
RSV5
RSV6
RSV7
VC(1)
VDDA
VSSA
RSHP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VSSD
27 GPIO(3)
26 GPIO(2)
25 GPIO(1)
24 GPIO(0)
23 RSV1
22 VPP
21 RSV2
20 RSV3
19 RSV4
18 ROSC
17 VREFT
16 VNTC
15 RSHN
28-pin SSOP Package (0.209 mil)
Pin Summary
Pin Name Type
Description
VDDD,
VSSD
Supply Digital supply voltage input,
ground
GPIO(0..7)
I/O Programmable digital I/O
SMB-CLK,
SMB-DTA
I/O SMBus Interface
VC(1)
I Pack voltage input
VDDA, VSSA
Supply
Voltage regulator output
(internally connected to
analog supply input);
ground
RSHP, RSHN I Current sense resistor input
VNTC
I External thermistor input
VREFT
O Thermistor reference
voltage
ROSC
I Internal oscillator bias
resistor
RSV1-7
I Reserved pins
VPP
I OTP programming voltage
2003 Microchip Technology Inc.
DS21766A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

PS402-01XX Datasheet

Single Chip Battery Manager

No Preview Available !

PS402-01XX
1.0 PRODUCT OVERVIEW
The PS402 is a fully integrated IC for battery manage-
ment that combines a proprietary microcontroller core
together with monitoring/control algorithms and 3D cell
models stored in 12 Kbytes of on-chip OTP EPROM.
Additional features include: precision 15-bit A/D and
mixed signal circuitry. On-chip EEPROM is provided for
storage of user-customizable and "learned" battery
parameters. An industry standard 2-wire SMBus v1.1
interface supports host communication using standard
SBData v1.1 commands and status.
The PS402 can be configured to accommodate all
Nickel rechargeable battery chemistries including
Nickel Metal Hydride and Nickel Cadmium. Future
versions will be added to support Pb-Acid.
Additional integrated features include an optional, high
accuracy on-chip oscillator and temperature sensor.
Eight general purpose pins support charge or safety
control, SOC LED display or user-programmable digital
I/O.
Microchip’s PS402 achieves the highest Smart Battery
Data accuracy in a single IC, providing space and total
system component cost savings for a wide variety of
portable systems.
FIGURE 1-1:
PS402 INTERNAL BLOCK DIAGRAM
VDDD
VPP
VDDA
Digital Section
112288bbyytete
EEEEPPRROOMM
12 K1b2yKtebyte
OTPOTEPPREOPMROM
RReegguulalatotorr
VVooltlataggee
RReefefererennccee
aanndd
TTeemmppeerraattuurre
Seensor
VREFT
SMB-CLK
SMB-DTA
SSMMBBuuss
InInteterfrafaccee
8
GPIO(7-0)
PPrrooggrraammmmaabblle
Deigital
DInipguitat/lOutput
VSSD
MMicicroroccoonntrtorolllelerr
CCoorere
SSiliilcicoonnOOssccilillalatotorr
1155-B-Bitit
SSigigmmaa-D-Deeltlata
InInteteggraratitningg
AA/D/DCCoonnvveertreterr
AAnnaalologg
InInppuut tMMuuxx
Analog Section
ROSC
VSSA
VC(1)
RSHP
RSHN
VNTC
DS21766A-page 2
2003 Microchip Technology Inc.


Part Number PS402-01XX
Description Single Chip Battery Manager
Maker Microchip Technology
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