PS501 Datasheet, PDF (1/42 Pages) Microchip Technology – Single Chip Field Reprogrammable Battery Manager

PS501
Single Chip Field Reprogrammable Battery Manager
Features
• Single chip solution for rechargeable battery
management
• Footprint compatible with PS401
• SMBus 1.1 and SBData 1.1 compatible
• Precise capacity reporting for Lithium Ion and
Lithium Polymer battery chemistries
• Embedded PowerSmart^® patented algorithms
contained in customizable on-chip 16-Kbyte Flash
memory
• User configurable and “learned” parameters
stored in on-chip 256 x 8 EEPROM
• Algorithms and parameters fully field
reprogrammable via SMBus interface
• Integrating sigma-delta A/D converter with 9 to
16-bit programmable resolution which accurately
measures:
- Current through sense resistor
- High-voltage (18V) battery cells directly
connected to VCELL inputs
- Temperature measurement from on-chip
sensor or optional external thermistor
• Integrated precision silicon time base
• Twelve individually programmable input/output
pins that can be assigned as charge control I/O,
secondary safety function I/O, SOC LED output or
general purpose I/O
- Two of the twelve I/Os are high voltage,
capable for direct drive of Charge and Safety
FETs
• On-chip regulator generates precision digital and
analog supply voltages directly from pack voltage
• Supports direct connection to 2 to 4-cell Lithium
packs
• Flexible power operating modes:
- Run: Continuous operation
- Sample: Periodic measurements at
programmable intervals
- Sleep: Shutdown mode due to low voltage.
Power consumption less than 25 µA.
- Shelf-Sleep: Shuts off PS501 power consumption
for pack storage with automatic wake-up on pack
insertion. Power consumption is less than 1 µA.
• Integrated Reset Control
- Power-on Reset
- Watchdog Timer Reset
- Brown-out Detection Reset
Pin Description
VDDD
1
GPIO(4)
2
GPIO(5)
3
GPIO(6)
4
GPIO(7)
5
SMB-CLK
6
SMB-DTA
7
VC(4)
8
VC(3)
9
VC(2)
10
VC(1)
11
VDDA
12
VSSA
13
RSHP
14
28
VSSD
27
GPIO(3)
26
GPIO(2)
25
GPIO(1)
24
GPIO(0)
23
GPIOHV2
22
MCLR
21
GPIOHV1
20
GPIO(9)
19
GPIO(8)
18
ROSC
17
VREFT
16
VNTC
15
RSHN
28-pin SSOP Package - 209 mil
Pin Summary
Pin Name Type
Description
VDDD, VSSD Supply Digital supply voltage input,
ground
GPIO(0..9)
I/O Programmable digital I/O
GPIOHV1,2
I/O Open-drain programmable
digital I/O for direct drive of
FETs
MCLR
I Master Clear. Pull-up in
normal operation
SMB-CLK,
SMB-DTA
I/O SMBus interface
VC(1..4)
I Cell voltage inputs
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
 2004 Microchip Technology Inc.
DS21818C-page 1