APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
FEATURES
WIDE SUPPLY RANGE--200V
UP TO 100A PULSE SOURCE
THERMAL SHUTDOWN
SOA SENTRY
TM
APPLICATIONS
HIGH POWER LASER DIODE DRIVER
DESCRIPTION
The PD01 is a precision pulse current source which can sink
currents up to 100 amps and work off supply voltages up to
200V. The output current can be controlled by an analog input
voltage or analog input and gate signal combination. By gating
the analog input voltage it is possible to simultaneously ampli-
tude modulate and pulse width modulate the output current.
The PD01 has extensive circuitry that protects not only itself
but the load as well. The temperature and instantaneous
power dissipation of the output transistors is monitored. Ex-
cessive temperature or power dissipation will trip the SOA
SentryTM alarm which shuts down the amplifier. If the output
current does not reach the programmed level in 10
S the
output is also shutdown and the U-C (under-current) output
alarm is activated. Although used primarily as a pulse current
source the PD01 can also be operated in a DC mode within its
power dissipation limits.
H T T P : / / W W W . A P E X M I C R O T E C H . C O M ( 8 0 0 ) 5 4 6 - A P E X ( 8 0 0 ) 5 4 6 - 2 7 3 9
M I C R O T E C H N O L O G Y
HIGH CURRENT PULSE DRIVER
PD01
BLOCK DIAGRAM AND EXTERNAL CONNECTIONS
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 USA APPLICATIONS HOTLINE: 1 (800) 546-2739
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
NOTES: 1.
Unless otherwise noted: T
C
= 25
C, V
S
, V
CC
at typical specification.
2.
Guaranteed but not tested.
CAUTION
PARAMETER
TEST CONDITIONS
1
MIN
TYP
MAX
UNITS
ANALOG INPUT
INPUT PIN 2
0
2
V
LOGIC IN/OUT
GATE, RESET, U-C
SOA FAULT OUT
5V Logic Levels
5
V
POWER OUTPUT
CURRENT, peak
2
100
A
DUTY CYCLE, WITHIN SOA
100
%
PULSE WIDTH
10
DC
sec
RISE/FALL TIME
5
sec
ACCURACY, Io=100A
1V full scale
1
%
OUTPUT VOLTAGE
I
O
= 100A
3
V
POWER SUPPLY
VOLTAGE, V
S
Full temperature range
200
V
VOLTAGE, V
CC
15
15.5
V
PROTECTION
SOA VIOLATION SHUTDOWN
10
sec
SOA FAULT FLAG
5V Logic Levels
5
V
THERMAL
RESISTANCE, junction to case
Full temperature range
.25
C/W
RESISTANCE, junction to air
Full temperature range
8
C/W
TEMPERATURE RANGE, case
Meets full range specifications
25
+85
C
SUPPLY VOLTAGE, +V
S
200V
POWER DISSIPATION, internal
500W
TEMPERATURE, pin solder - 10s
300
C
TEMPERATURE, junction
2
150
C
TEMPERATURE, storage
-25
C to +100
C
OPERATING TEMPERATURE RANGE, case
-25
C to +85
C
The PD01 is constructed from MOSFET transistors. ESD handling procedures must be observed.
PD01
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
PROTECTION CIRCUITS AND START-UP CONDITIONS
When the commanded output current is not reached within
about 10
S the PD01output is latched off and the U-C (under-
current) pin 21 is set high. This will likely occur at power-up. It
is therefore recommended that a power-up reset be imple-
mented using the RESET pin (24). In addition it is recom-
mended that the analog input (pin 2) be set to zero at power-
up and that GATE pin 22 is required to be set high on power-
up.
The PD01 monitors the temperature of the output transistors
as well as the output voltage and current and continually
calculates the power dissipation in the output transistors.
When the SOA of the output transistors is exceeded the output
is latched off and the SOA FAULT pin 23 is set high.
MODULATING THE OUTPUT
The output current can be set and modulated in two ways or
a combination of the two ways:
1. When the GATE pin 22 is set high an analog input pulse can
drive the output to the desired value (see Scaling below).
2. With a DC voltage on the analog input pin 2 set to the desired
value the GATE pin 22 can be toggled to produce an output
current pulse similar to the gate pulse.
3. Both the ANALOG INPUT voltage and GATE pins can be
varied simultaneously to modulate the output in amplitude
and time.
SCALING
Refer to the block diagram of the PD01 for this discussion.
Any analog input voltage up to 2V can be used to represent the
full-scale output current of 100 amps. However, the protection
circuits are scaled to consider 1V across the current sense
resistor as 100 amps. The accuracy of the PD01 is also
referenced to 1V full scale. In the case where 100 amps is the
required full scale current connect Isense pin 6 to pin 7. When
the full scale current is less than 100 amps scale the current
sense resistor to produce 1V at the desired full scale current
and divide down that voltage with R1 and R2 so that the correct
voltage is supplied to I
SENSE
pin 6 to represent the actual current
as a portion of the 100 amps full scale capability.
STABILITY
Refer to the block diagram for this discussion. Circuit stabil-
ity can be achieved by varying Rc in the block diagram. This will
affect current rise time and overshoot. Experimentation is the
best way to determine the value needed in the application
circuit. The suggested starting value is 1k ohms.
POWER SUPPLIES
The small signal portion of the PD01 is power by
15V. The
supplies should be regulated and bypassed at the supply pins.
An unregulated power supply must be used to power the laser
diode otherwise a conflict develops between that regulated
supply and the PD01 which can also be considered as a
regulated supply.
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
PD01U REV. A JANUARY 2001
2001 Apex Microtechnology Corp.
OPERATING
CONSIDERATIONS
PD01
DIP9 PACKAGE
WEIGHT: 69 g or 2.4 oz
DIMENSIONS ARE IN INCHES
ALTERNATE UNITS ARE [MM]
PDF 
ZIP