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PS402-01XX

Description
Single Chip Battery Manager - Nickel Chemistries
File Size310KB,46 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Download Datasheet View All

PS402-01XX Overview

Single Chip Battery Manager - Nickel Chemistries

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
28
27
26
25
24
VSSD
GPIO(3)
GPIO(2)
GPIO(1)
GPIO(0)
RSV1
VPP
RSV2
RSV3
RSV4
ROSC
VREFT
VNTC
RSHN
7
8
9
10
11
12
13
14
PS402
6
23
22
21
20
19
18
17
16
15
28-pin SSOP Package (0.209 mil)
Pin Summary
Pin Name
VDDD,
VSSD
GPIO(0..7)
SMB-CLK,
SMB-DTA
VC(1)
VDDA, VSSA
Type
Description
Supply Digital supply voltage input,
ground
I/O
I/O
I
Programmable digital I/O
SMBus Interface
Pack voltage input
Supply Voltage regulator output
(internally connected to
analog supply input);
ground
I
I
O
I
I
I
Current sense resistor input
External thermistor input
Thermistor reference
voltage
Internal oscillator bias
resistor
Reserved pins
OTP programming voltage
RSHP, RSHN
VNTC
VREFT
ROSC
RSV1-7
VPP
2003 Microchip Technology Inc.
DS21766A-page 1
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