PS042 Microchip Technology, PS042 Datasheet - Page 2

• Manufacturer Part Number: PS042
• Description: BOARD PWR CALIBRATION FOR PS401
• Manufacturer: Microchip Technology

Specifications of PS042

• Processor To Be Evaluated: PS 40X family
• Interface Type: RS-232, RS-485
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PS042
1.0
The PowerCal calibration board is a comprehensive
hardware platform that supports configuration, verifica-
tion, calibration and production test of Microchip
PowerSmart Smart Battery systems. It operates under
the control of Microchip’s PowerTool Development/Test
software interfaced to a Windows PC.
The PowerCal board facilitates serial communication
between the PC and the SMBus interface on smart bat-
teries, providing a direct connection to both. Under the
control of PowerTool software, the PowerCal board
performs loading and verification of battery configura-
tion parameters and 3D cell models in PS40X
EEPROM and OTP memory.
In addition, the PowerCal platform provides a complete
precision system for calibrating current, voltage and tem-
perature measurements in a Smart Battery, eliminating
the need for expensive meters or power supplies.
During calibration, the PowerCal board accurately
measures current, voltage and temperature and
compares these measured values to those reported by
the Smart Battery. Calibration values are then loaded
into the programmable storage and used by the chip to
compensate raw measurements made during normal
operation. Reported values from the PowerSmart IC
are therefore corrected to eliminate known, measured
errors.
The PowerCal platform accomplishes calibration with
programmable load and precision measurement
hardware so that a known, constant discharge current
is drawn from the battery pack. The programmable load
circuit is capable of drawing up 36W continuous
discharge power from the battery pack during calibra-
tion using natural convection cooling. Higher discharge
currents are supported at reduced duty cycles, and/or
with forced air cooling. In addition, there are provisions
for the user to add their own external charger or load,
at up to 10A.
The PowerCal board is designed to support both
development and test environments. Both RS-232 and
RS-485 interfaces are present so that the board can
operate with a stand-alone connection (RS-232), or
with a multidrop connection (RS-485) to the host PC.
The hardware supports up to 7 PowerCal boards inter-
faced on a multidrop link from a PC COM port. As a
result, up to 28 boards can be interfaced on a single PC
with 4 COM ports. PowerCal boards can fit in a DIN 6U
rack (2.25" board spacing); they can also be panel
mounted.
Extensive safety features include production proven
EMI/ESD protection, optical isolation of the serial ports
and protective fuses. Fuses protect the device under
test, the PowerCal hardware and any connected
external charger or load. The board is implemented
using 4 layers with a dedicated ground plane. All I/Os
are connected to bypass capacitors to earth ground.
DS40237B-page 2
PRODUCT OVERVIEW
2.0
The Microchip PowerCal platform is a very powerful,
versatile calibration, test and evaluation system. It can
be used in a variety of ways, as a single board in a
development environment and as a multi-board system
in a high volume production environment. The instruc-
tions that follow will guide you through setup for each of
the features on the board. References to modules refer
to PCB products not yet assembled into packs or
connected to cells.
Power is provided to the board to the JP connector with
a 24V DC, 500 mA power supply wall adapter.
2.1
• JP – 24V DC power supply.
• TBP – Pluggable terminal block alternate 24V DC
• TBS – Pluggable terminal block for board level
• TBC – Support for future capability.
• TBB – Pluggable terminal block for device under
• PC – Support for future capability.
power supply (parallel connections with JP).
test I/Os (to be developed later).
test, module or pack (includes connections for cell
voltage measurement and programming voltage).
GENERAL SETUP
Connections
 2003 Microchip Technology Inc.