PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 2

• Manufacturer Part Number: PS401-I/SS
• Description: IC FUEL GAUGE BATTERY MGR 28SSOP
• Manufacturer: Microchip Technology

Specifications of PS401-I/SS

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PS401
1.0
The PS401 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.
FIGURE 1-1:
DS40238B-page 2
GPIO<7:0>
SMB-CLK
SMB-DTA
PRODUCT OVERVIEW
8
PS401 INTERNAL BLOCK DIAGRAM
Programmable
Digital Section
Input/Output
EEPROM
Interface
128-byte
SMBus
Digital
V
SSD
V
DDD
OTP EPROM
Silicon Oscillator
12-Kbyte
Microcontroller
Core
R
OSC
V
PP
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 PS401 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.
Analog Section
A/D Converter
Sigma-Delta
Integrating
Regulator
15-Bit
Regulator
V
SSA
Temperature
Analog
Reference
Input
Mux
Voltage
Sensor
V
 2003 Microchip Technology Inc.
and
DDA
3
VC(1)
VC(2-4)
RSHP
RSHN
V
V
REFT
NTC