Apex SA18 Datasheet
PULSE WIDTH MODULATION AMPLIFIER
TOP
VIEW
CLK IN
CLK OUT
+PWM
FLAG
SIG GND
SHDN
NC
NC
+VS
VCC
*
*
OUT
PWR GND
1
2
3
4
5
6
12
11
10
9
8
7
TOP
VIEW
Case tied to pin 5. Allow no current in case. Bypassing of supplies
is required. Package is Apex MO–127 (STD). See Outline
Dimensions/Packages in Apex data book.
As +PWM goes more positive, out duty cycle increases.
*See text.
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
FEATURES
• HALF BRIDGE IGBT OUTPUT
• WIDE SUPPLY RANGE—16-500V
• 20A TO 100°C CASE
• 3 PROTECTION CIRCUITS
• SYNCHRONIZED OR EXTERNAL OSCILLATOR
• FLEXIBLE FREQUENCY CONTROL
APPLICATIONS
• MOTORS
• REACTIVE LOADS
• LOW FREQUENCY SONAR
• LARGE PIEZO ELEMENTS
• OFF-LINE DRIVERS
• C-D WELD CONTROLLER
DESCRIPTION
The SA18 is a pulse width modulation amplifier that can
supply 10KW to the load. An internal oscillator requires no
external components. The clock input stage divides the oscillator frequency by two, which provides the switching frequency of 22.5 kHz. External oscillators may also be used to
lower the switching frequency or to synchronize multiple
amplifiers. A shutdown input turns off both drivers of the half
bridge output. A high side current limit protects the amplifier
from shorts to ground in addition to load shorts. The output
IGBTs are protected from thermal overloads by directly sensing the temperature of the die. The 12-pin hermetic MO-127
power package occupies only 3 square inches of board space.
SA18
∆
TE949311
EXTERNAL CONNECTIONS
SA18
U
S
A
BeO
BLOCK DIAGRAM AND TYPICAL APPLICATION
VOLTAGE CONTROLLED VOLTAGE SOURCE
Vcc
10
+PWM
3
4
FLAG
CLK OUT
CONTROL
SIGNAL
3/7V
5V
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
2
CLK IN
1
5
SIG GND
470pF
OSC
56K
÷2
10V
P-P
CURRENT
LIMIT
PWM
OUTPUT
DRIVERS
SHUTDOWN
CONTROL
9
+V
S
OUT
8
12
NC
NC
11
6
SHDN
7
PWR GND
5V
.01
5K
µF
RSENSE
LOAD
SA18
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +V
SUPPLY VOLTAGE, V
POWER DISSIPATION, internal
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction
S
CC
1
2
500V
16V
125W
150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C
INPUT VOLTAGE, +PWM 0 TO +11V
INPUT VOLTAGE, SHDN 0 TO +11V
SPECIFICATIONS
PARAMETER TEST CONDITIONS
CLOCK (CLK)
CLK OUT, high level
CLK OUT, low level
CLK IN, low level
CLK IN, high level
4
4
4
4
I
≤ 1mA 4.8 5.3 V
OUT
I
≤ 1mA 0 .4 V
OUT
FREQUENCY 44.10 45.00 45.9 kHz
ANALOG INPUT (+PWM)
center voltage 5V
P-P voltage 0/100% modulation 4 V
FLAG
FLAG, high level 10 V
FLAG, low level 0V
OUTPUT
TOTAL DROP I = 20A 2.7 V
EFFICIENCY, 20A output VS = 380V 98 %
SWITCHING FREQUENCY OSC in ÷ 2 22.05 22.50 22.95 kHz
CURRENT, continuous
CURRENT, peak
4
4
100°C case 20 A
2
MIN TYP MAX UNITS
0.9V
3.7 5.4 V
28 A
POWER SUPPLY
VOLTAGE, V
VOLTAGE, V
CURRENT, V
CURRENT, V
CURRENT, V
I
/SHUTDOWN
LIM
S
CC
CC
shutdown 50 mA
CC,
S
I
= 0 80 mA
OUT
No Load 45 mA
15 240 500 V
14 15 16 V
TRIP POINT 90 110 mV
INPUT CURRENT 100 nA
THERMAL
3
RESISTANCE, junction to case 1 °C/W
RESISTANCE, junction to air 12 °C/W
NOTES: 1. Each of the two output transistors can dissipate 125W, but only one is on at any time.
2. Unless otherwise noted: TC = 25°C, VS, VCC at typical specification.
3. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power
dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet.
4. Guaranteed but not tested.
CAUTION
The SA18 is constructed from static sensitive components. ESD handling procedures must be observed.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush,
machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
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