MPD SRL10A-12

SRL10A-12
Miniature Surface Mount
10A Output, Switching
POL Regulators
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Key Features:
• 10A Output Current
• Wide 9.0V - 14V Input Range
• Efficiency to 95%
• EN 60950 Approved (UL)
• Miniature SMT Construction
• Short Circuit Protected
• Thermal Shutdown
• Remote On/Off Control
• Industry Standard Footprint
Input
Parameter
Input Voltage Range
Conditions
Under Voltage Lockout, Power Up
Maximum Input Current
Off Input Current
Turn On Delay Time
Input Filter
Input Reflected Ripple Current
VOUT 4.5V
Turn On Voltage Threshold
Turn Off Voltage Threshold
Lockout Hysteresis Voltage
IOUT = 100%, VIn = 0 to 14 VDC
Input Idle Current
Min.
9.0
Typ.
12.0
8.0
7.7
0.3
Max.
14.0
VDC
7.0
10
Capacitive
See Note 1
Units
VDC
3.5
A
mA
mS
200
mA P-P
Output
Parameter
Output Voltage/Current
Output Voltage Tolerance
Line Regulation
Load Regulation
Conditions
Min.
Typ.
See Model Selection Guide
VIN = Min to Max
IOUT = 0% to 100%
Ripple & Noise (20 MHz)
See Note 2
Transient Recovery Time, See Note 3
Temperature Coefficient
Short Circuit Protection
Over Temperature Protection
Overload Protection
50% Load Change
Continuous (Hiccup Mode)
See Note 4
120
See Note 5
15
17
Max.
Units
±1.5
±0.2
±0.5
50
20
200
±0.03
%
%
%
mV P-P
mV RMS
µSec
%/°C
20
°C
A
Max.
Units
General
Parameter
Isolation Voltage
Switching Frequency
Remote On/Off, See Note 6
Parameter
Unit On
Unit Off
On/Off Current
Conditions
Min.
Not Isolated
Fixed
Conditions
Min.
Logic High
Logic Low
VON/VOFF = 0.0V
0.0
Typ.
300
kHz
Typ.
Max.
Open or VIN
0.4
1
Units
VDC
mA
Environmental
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Suite D
Stoughton, MA 02072
USA
T: (781) 344-8226
F: (781) 344-8481
E: [email protected]
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Parameter
Operating Temperature Range
Storage Temperature Range
Cooling
Humidity
Physical
Size
Weight
Conditions
Min.
Typ.
Max.
-40
+25
+85
-55
+125
Free Air Convection (See Derating Curves)
RH, Non-condensing
93
Ambient
Units
°C
°C
%
1.3 x 0.53 x 0.346 Inches (33.0 x 13.46 x 8.8 mm)
0.299 Oz (8.5g)
Reliability Specifications
Parameter
MTBF
Safety Standards
Conditions
Min.
Typ.
MIL HDBK 217F, 25°C, Gnd Benign
980
UL 60950, EN 60950
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Max.
Units
kHours
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Model Selection Guide
Model
Number
SRL10A-12-5.0
Input
Voltage (VDC)
Current (mA)
Voltage
Range
Full-Load No-Load (VDC)
992
40
0.75
1,163
50
1.20
1,404
50
1.50
1,666
60
1.80
9.0 - 14.0
1,823
60
2.00
2,264
60
2.50
2,956
70
3.30
4,385
70
5.00
Notes:
1. Measured over a bandwidth of 5 Hz to 20 MHz using a 1 µH inductor.
2. Output ripple is measured at 20 MHz bandwidth using a 1.0 µF
ceramic capacitor and a 10 µF tantalum capacitor connected in
parallel as close to the output terminals as possible.
3. Transient recovery is measured to within a 200 mV error band for a
50% load change.
4. These units include a non-latching over temperature protection
circuit. If the temperature exceeds approximately 120°C at the
monitored “hot spot”, the unit will be shut down. When the temperature decreases, the unit will automatically restart. See page 3
for temperature measurement information.
5. These units will provide up to 150% of rated current. In the event of
an over current fault, the unit will go into hiccup mode until the fault
is removed.
6. Standard units feature an active high remote control input. See the
note and diagram at right.
7. These units do not include an internal fuse. It is recommended that
an external slow-blow fuse be used with a rating as shown in the
table above.
Output
Current
Current
(A, Max)
(A, Min)
10.0
0.0
Fuse Rating
Efficiency Capacitive
Load
Slow-Blow
(%, Typ)
82
86
89
90
91
92
93
95
(µF Max)
(A)
8,000
20
Remote On/Off
These units include an active high
On/OFF control input. The unit is
“ON” if the input to the control pin
(pin 2) is high; or if the pin is left
open (or floating). The signal level
of the control input is referenced
to ground. A recommended drive
circuit for the control pin is shown
at left. The resistors R1 & R2 have
been added to help reduce possible false triggering of the control
input due to leakage currents.
Units are available with an active
low control input. With this input,
the unit will remain off if the control input remains above 2.8 VDC.
For more information on the active
low option, contact the factory.
Typical Connection
Notes:
Fuse:
Input Filter:
SRL10A-12 regulators do not include an internal fuse. For
safety and protection, a external slow-blow fuse should be
placed in the input (+VIN) line. A 20A fuse is recommended.
The unit must be connected to a low AC impedance source,
and to avoid loop stability issues, the source inductance
should also be low. To significantly reduce ripple caused by
the switching action of the POL, the SRL10A-12 includes
onboard filtering. However, adding input capacitors C1 and
C2 will further reduce ripple currents (C1) and high frequency
noise spikes (C2). These capacitors should be placed as
close to the input pins as possible (see board layout at right).
It is recommended that low ESR (<100 m) and low ESL
ceramic capacitors be used. Recommended values are:
C1
33 µF to 250 µF
C2
0.01 µF
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Remote ON/OFF:
See note above
Output Trim:
See note on page 4
Remote Sense:
The remote sense helps regulate the output voltage at
the point of load by minimizing the effects of distribution
losses. The voltage between the sense pin (Pin 3) and
the point of load should not exceed 500 mV. When using
the remote sense function, the output voltage level may
rise. Care must be taken not to exceed the maximum
rated output power of the regulator. When not in use, the
remote sense pin should be tied to the output pin of the
regulator.
Output Filter:
Output filtering is not required, but may be used to further
reduce output ripple & noise; or to adjust the transient
response time of the unit. Care must be taken not to exceed
8,000 µF, the maximum value of output capacitance the
unit is rated for. The values given in the connection diagram are typical for light filtering.
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Derating Curves
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 5.0 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 3.3 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 2.5 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 2.0 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 1.8 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 1.5 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 1.2 VDC
SRL10A-12W-5.0 - VIN = 12 VDC, VOUT = 0.75 VDC
Temperature Measurement
These switching regulators may be used in a wide variety of thermal environments, but must be properly cooled to ensure long reliable operation. The derating curves shown above are approximations of the ambient temperature and airflow required to maintain the
switching regulator temperature below its maximum rating. Airflow should move across the unit, as shown above. Proper cooling can
be verified by measuring the temperature at the reference point (as shown at left). The thermocouple should be mounted approximately
0.5 in. off the unit board. The temperature at this location should not exceed 120°C.
MicroPower Direct
•
292 Page Street Ste D Stoughton, MA 02072
• TEL: (781) 344-8226 • FAX: (781) 344-8481 • E-Mail: [email protected]
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Output Voltage Trim
The output voltage level of the SRL10A-12 series is adjustable over
a wide range by the simple addition of an external resistor. This trim
resistor is connected between the circuit common and the trim input,
as shown in the diagram at left.
The required resistor value for various output levels is given in the
table above. To calculate the correct value for a different output
level, the formula is:
R TRIM =
SRL10A-12-5.0
VOUT (VDC)
RTRIM (k)
0.75
Open
1.20
22.33
1.50
13.00
1.80
9.00
2.00
7.40
2.50
5.00
3.30
3.12
5.00
1.47
10, 500
- 1, 000
VOUT - 0.75
Where: RTRIM = The external trim resistor
VOUT = The desired output voltage
If a trim resistor is not connected, the output is 0.75 VDC.
Suggested Board Layout
This diagram illustrates a simple board layout for
use with the SRL10A-12 series. As recommended,
external components are placed as close to the
unit as possible. To help shield external circuitry,
the ground plane has been extended under the
unit. Any signal traces should not be routed
underneath the unit (unless they are on a layer
under the ground plane) to avoid unwanted noise
interference.
Pin Connections
Pin
1
2
4
Suggested Solder Reflow Profile
Description
+V Input
Sense
Common
Pin
5
6
7
Description
+V Output
Trim
Sense
Mechanical Dimensions
Notes:
• All dimensions are typical in inches (mm)
• Tolerance x.xx = ±0.02 (±0.50)
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292 Page Street Ste D Stoughton, MA 02072
•
TEL: (781) 344-8226
•
FAX: (781) 344-8481
•
E-Mail: [email protected]