PE-SRD switching regulator

PE-SRD switching regulator
SRD- Switching
Regulator
Step-down regulator
Technical Information- Power Electronics
S e e i n g wi t h L E D L i g h t i n g
TM
Switch-mode Step-down Regulator
The SRD power converter
is a high frequency,
switch-mode, step-down
regulator for applications
requiring stable power.
The compact and efficient
design requires little
heatsinking or support
components. It provides
the functions of bench-top
power supplies in a
smaller and more efficient setup.
Features
- Adjustable voltage (CV) and current (CC) limiting.
- Power protection and filtering.
- Wide input voltage range.
- Stable voltage and current limiting.
- Efficient high frequency switch-mode design.
Benefits
- Economical and easy-to-use.
- Compact and efficient.
- Reliable operation.
- Provides stable power to load.
Applications
- Bench-top power supply.
- Powering electronic products.
- Battery charging.
- Replace lost or broken power supplies.
- Marine, industrial, auto, recreational
Camping, remote field-use, others.
Available Models
OT-PESRD-0V2-01: 35V input max.,
adjustable 6-17VDC output, 2A max. CV or
CC/CV models available. Other output
voltages available.
Voltage and current limiting
The benefits of providing clean, regulated power to equipment result in a more reliable and costeffective system over the lifespan of the product. Many users do not take into account clean power
until the equipment provides problems or fails. Also, many systems do not operate at optimum
performance if power is inconsistent. Some electronic components such as LEDs require constant
current operation. The LEDs operating voltage drastically decreases with increasing temperature and
decreasing forward current. If the LEDs were operated in a fixed, constant voltage method with
minimum power limiting, the operating current may increase more than 50% from cold. There is the
chance of thermal runaway and the LEDs becoming damaged. A power regulator with voltage and
current limiting will maintains the LEDs in an optimum power band for maximum life and performance.
Technical Specifications:
Input voltage:
Output voltage:
Output current:
Current limit control:
Noise:
Operation temperature:
Dimension:
9-35VDC
6-17VDC, up to 30VDC
0-3.0A
0.51A-2.1A
<100mV ripples, <150mVp-p voltage spikes at full load.
-20OC to 60OC
2.3”x2.1”
Note: Do not use in wet or damp locations. Do not exceed the specifications of the unit.
The unit should be mounted away from sunlight for easier viewing of the display.
Operation
The SRD Switching Regulator uses the LM2596T-ADJ 150kHz 3A simple switching regulator to
provide the power converter functions. There is an op-amp and some passive components to provide
current and voltage feedback to the switching regulator. The PCB is designed to maximize heat
Onstate Technologies Inc. BC, Canada
www.OnstateTech.com
Specifications subject to change without notice.
[email protected]
Page 1 of 5
File Name: tech PESRD switching regulator rev1.doc rev 1, 04/11
SRD- Switching
Regulator
Step-down regulator
Technical Information- Power Electronics
S e e i n g wi t h L E D L i g h t i n g
TM
dissipation and minimum noise generated with thick traces and component separation. All the power
conversion components (inductors and capacitors) are on one side while the feedback control is on the
opposite side of the switching regulator. The SRD has voltage and current limiting operation similar to
a standard bench-top power supply. See SRD schematic and LM2596T-ADJ technical data sheet for
more information.
Installation
Please read the appropriate data sheet prior to installation for best results. The installation should be
made by a qualified service person and conforms to all appropriate local codes. Onstate Technologies
Inc. will not be responsible for injuries or damages resulting from the improper installation or use of any
products sold by Onstate or its retailers. Install the product within its specification limits.
The installation of the SRD Switching Regulator is straight-forward. Apply input DC power and adjust
the output voltage and current is all is required. A digital multimeter will help in the ease of the setup.
Do not use the product in high temperature or direct sunlight locations. The SRD unit get warm when
operation at full power. Make sure that there is good air circulation around the product.
Control Adjustments
The only control adjustments are for output voltage and current limit setting.
Mounting hole dimensions
All units in inches
Mounting dimensions are 1/8” diameter for #4 or M3 bolts.
Application Example
1.
2.
3.
4.
Battery charging.
LED array power control.
Sensitive electronic equipment.
Bench-top power supply.
Onstate Technologies Inc. BC, Canada
www.OnstateTech.com
Specifications subject to change without notice.
[email protected]
Page 2 of 5
File Name: tech PESRD switching regulator rev1.doc rev 1, 04/11
SRD- Switching
Regulator
Step-down regulator
Low-cost switching regulator.
Technical Information- Power Electronics
S e e i n g wi t h L E D L i g h t i n g
TM
Low-cost fixed voltage linear regulator.
SRD design and assembly
Top silkscreen (legend) layer for SRD and PCB top layer.
Onstate Technologies Inc. BC, Canada
www.OnstateTech.com
Specifications subject to change without notice.
[email protected]
Page 3 of 5
File Name: tech PESRD switching regulator rev1.doc rev 1, 04/11
SRD- Switching
Regulator
Step-down regulator
Technical Information- Power Electronics
S e e i n g wi t h L E D L i g h t i n g
TM
Schematic of SRD Switching Regulator
Table 1. Bill-of-materials for SRD Switching Regulator.
Part #
LM2596TADJ
LM258
Digi-Key #
LM2596T-ADJ -ND
296-6625-5-ND
2-pos.
1N4148
L1
L2, L3
L4
1N5822DICT-ND,
1N5822GICT-ND
1N4148DICT-ND,
1N4148MSCT-ND
M6011-ND
M6023-ND
TK4444-ND
35V330
P5167-ND
50V220
P5183-ND
35V47
P5164-ND
1N5822
104
105
BC1127CT-ND
3019PH-ND
103
BC1130CT-ND
203
Description
150kHz, 3A simple switcher
regulator, To-220
LM258 dual op-amp, 8-pin DIP
2-position terminal block, 0.15”
spacing
IC1
IC2
1
1
H1, H2
2
3A Schottky diode
D1, D2
2
low power signal diode.
22uH inductor, JW Miller
220uH inductor, JW Miller
47uH inductor, Toko
D4, D5/R6
L1
L2, L3
L4
2
0
2
0
C8, C9
1
C3, C4
2
C12
1
50V 0.1uF mono. cap, 0.2" spacing
63V 1uF mylar cap. 0.2” spacing
50V 0.01uF mono. ceramic. cap.
0.2” spacing
C1, C11
C2, C6
2
2
C7
1
20k variable resistor
VR1
1
35V 330uF electrolytic cap, 0.2”
spacing
50V 220uF electrolytic cap, 0.2”
spacing
35V 47uF electrolytic cap, 0.1”
spacing
Onstate Technologies Inc. BC, Canada
www.OnstateTech.com
Specifications subject to change without notice.
Designation
Qty
[email protected]
Page 4 of 5
File Name: tech PESRD switching regulator rev1.doc rev 1, 04/11
SRD- Switching
Regulator
Step-down regulator
103
green
LED
0.05
1k
4.3k
4.7k
560k
15k
heatsink
Metal
plate
assembly
hardware
PCB
160-1130-ND
1.0kEBK-ND
4.3kEBK-ND
4.7kEBK-ND
560kEBK-ND
15kEBK-ND
Technical Information- Power Electronics
S e e i n g wi t h L E D L i g h t i n g
10k variable resistor
VR2
1
Green LED, T1-3/4 size
0.05 ohm, 1W power resistor
1k 1/8W resistor
4.3k 1/8W resistor, 6.2-18.5V out
4.7k 1/8W resistor
560k 1/8W resistor
15k 1/8W resistor, 1-2.5A CC
LED1
R8
R2, D3, R5
R4
R7
R1
R6
1
1
3
3
3
1
1
1
Onstate Technologies Inc. BC, Canada
www.OnstateTech.com
Specifications subject to change without notice.
TM
1
1
1
1
[email protected]
Page 5 of 5
File Name: tech PESRD switching regulator rev1.doc rev 1, 04/11
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