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
PowerCal is a comprehensive hardware platform that
supports configuration, verification, 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
batteries, providing a direct connection to both. Under
control of PowerTool, PowerCal performs loading and
verification of battery configuration 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
temperature 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 interfaced
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/O’s
are connected to bypass capacitors to earth ground.
DS40237A-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
instructions 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 – cell simulator port
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
 2002 Microchip Technology Inc.