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PDF PWM5032 Data sheet ( Hoja de datos )
| Número de pieza | PWM5032 | |
| Descripción | RadHard High Speed PWM Controller | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PWM5032 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
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Standard Products
PWM5032 RadHard High Speed PWM Controller
Radiation Tolerant
www.aeroflex.com/PWM
April 22, 2010
FEATURES
❑ Radiation performance
- Total dose 1 Mrad (Si), Dose rate = 50 - 300 rads(Si)/s
- SEL:
Immune to 100 MeV-cm2/mg
- SEU:
Immune up to 20 MeV-cm2/mg
(Upsets found were benign and non-stressful to the PWM or supporting electronic components)
❑ CMOS low power design
❑ Sleep & enable control lines
❑ Optimized for applications: buck, boost, flyback, forward and center tapped push-pull converters
❑ Supports current mode or voltage mode operations
❑ Selectable 50% / 100% duty cycle
❑ Under-Voltage lockout with hysteresis
❑ Dual ±1Amp peak totem pole outputs
❑ 1 MHz maximum – user selectable
❑ Low RO error amp
❑ Auxiliary op amp with shut down pin
❑ Power OK indicator
❑ PWM5034 - Same as PMW5032 except straight leads
❑ Designed for commercial, aerospace and high reliability space applications
❑ Ceramic 24-lead, hermetic package, .6L x .3W x .13H
- PWM5032 Gull Wing leads
- PWM5034 Straight leads
- Weight: 1.2 g max
❑ Evaluation board available for test and evaluation. See Aeroflex Application Note AN5031-1
❑ Available on DSCC SMD 5962-06251
NOTE: Aeroflex Plainview does not currently have a DSCC Certified Radiation Hardened Assurance Program
Developed in Partnership with JHU/APL and the Technology Application Group for the
Mars Technology Program; Part of NASA’s Mars Exploration Program
OVERVIEW AND GENERAL OPERATION
The chip is a fixed frequency Pulse Width Modulator based on the industry standard UC1843x Series with significant
enhancements in performance and functionality. The chip operates in either the voltage or current mode and can support a
wide variety of converter topologies.
Radiation hardened by design techniques ensure the chip’s outstanding radiation tolerance (>1MRads) while reducing
operating current by more than an order of magnitude over comparable parts.
The PWM5032 provides an under voltage lockout feature with hysteresis that also provides an output to indicate Power is
OK. An input called Sleep is used to power down the entire chip, the Enable input is used to shut down the
Oscillator / Output Drives, and the Soft input drives the Output to zero. There is also a signal input called ENAUX that is
used to disable the output to the auxiliary op-amp.
The dual output drivers are designed using a Totem Pole output capable of sinking and sourcing 50mA constant current and
peak currents up to 1 Amp to support a large variety of Power MOSFETs.
Additional features that boost the appeal and utility of the part are:
◆ Dual break-before-make Totem Pole output stage is employed that virtually eliminates cross conduction and current
shoot through
◆ Logic level input that allows the user to select either 50% or 100% maximum duty cycle operation
◆ Improved oscillator stage that vastly increases waveform linearity and reduces output voltage error
◆ Uncommitted on-board op-amp which can be used for signal conditioning, pulse feedback, or any other user defined
purpose
SCD5031 Rev P
1 page  
ELECTRICAL CHARACTERISTICS 1/, 4/
4.5 V < Vcc < 5.5V, -55°C < TA < +125°C, unless otherwise specified
PARAMETER
TEST CONDITIONS
MIN
Error Amp Section
Input Offset Voltage
-
Input Common Mode Voltage Range
Input Bias Current
Open Loop Voltage Gain (AVOL)
3/
VEE + 0.2
-
100
Unity Gain Bandwidth
1.0
Power Supply Rejection Ratio (PSRR)
60
Output Sink Current
Output Source Current
VOUT High (Limited by VSOFT)
VOUT Low
Gain (VCOMP/VISENSE)
Current Sense Section
Input Offset Voltage
Common Mode Input Voltage
Input Bias Current
ISENSE to Output Delay
VFB = 3.0V, VSOFT = 1.1V, 3/
VFB = 2.0V, VSOFT = 5V, 3/
VFB = 2.0V, RL = 15K to GND
VFB = 3.0V, RL = 15K to +5V
3/
3/
VSOFT = 5V,
3/ 4/
3/
-
-
VSOFT -
0.2
-
2.85
-
0.1
-
-
Output Section
Output Low Level
Output High Level-PWM5031
Output High Level-PWM5032
Peak Output Current
Steady State Output Current
Rise Time
Fall Time
ISINK = 1.0mA
ISINK = 50mA PWM5031
ISINK = 50mA PWM5032
ISOURCE = 1.0mA, DRVP = 5V
ISOURCE = 50mA, DRVP = 5V
ISOURCE = 1.0mA, DRVP = 12V
ISOURCE = 50mA, DRVP = 12V
3/
-
TA = 25°C, CL = 20pF, DRVP = 5V
3/
-
-
-
4.9
4.6
11.9
11.4
±1.0
-
-
-
Enable Output Off Delay
-
Sleep Output Off Delay
Under Voltage Output Off Delay
3/
-
-
TYP MAX
- 3.3
- VCC - 0.2
- -1.0
--
2.0 -
--
- +10
- -28
--
- VEE + 0.2
3 3.15
- 3.3
- 1.0
- 1.0
80 100
-
-
-
-
-
-
-
±1.35
-
8
6
-
-
-
0.1
0.25
0.6
-
-
-
-
-
50
18
28
100
100
100
UNITS
mV
V
µA
dB
MHz
dB
mA
mA
V
V
V/V
mV
V
µA
ns
V
V
V
V
V
V
V
A
mA
ns
ns
ns
ns
ns
SCD5031 Rev P 4/22/10
5
Aeroflex Plainview
5 Page 
VSOFT 7
2.5V
VFB 5
IS COMP 4
Error
Amp
2R
1.4V
R
R
RS C
CURRENT
6 SENSE
VEE
12
1V
Current
Sense
Comparators
SQ
RQ
Peak Current (Is) is determined by the formula:
ISMAX
=
1----.--0---V--
RS
or if VRS 1Volt then
ISMAX
=
V----S----O----F----T-----–-----1---.-4--
3RS
A small RC filter may be required to suppress switch transients
FIGURE 6 – Current Sense Circuit
120
80
Gain
dB 40
-55°C
+125°C
0
-40
1
10
100
1K
10K 100K
1M
10M
Frequency Hz (Log Scale)
FIGURE 7 – Error Amplifier Open-Loop Frequency Response
at +125°C & -55°C
SCD5031 Rev P 4/22/10
11
Aeroflex Plainview
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet PWM5032.PDF ] | |
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