MPD LD24E Low cost, pwm control constant current output dc/dc led driver Datasheet

LD24E-xx-xxx SSeries
Low Cost, PWM Control
Constant Current Output
DC/DC LED Drivers
Electrical Specifications
Specifications typical @ +25°C, nominal input voltage & rated output current, unless otherwise noted. Specifications subject to change without notice.
Key Features:
• 300 - 700 mA Output Current
• Constant Current Output
• PWM Dimming
Input
Parameter
Conditions
Input Voltage Range
Max Input Voltage
Min.
Typ.
Max.
Units
5.5
24.0
36.0
VDC
40.0
VDC
Max.
Units
32
VDC
See Note 1
Input Filter
Internal Capacitor
• Wide 5.5V to 36V Input Range Output
• Efficiency to 95%
Parameter
Conditions
Min.
Typ.
• Miniature Case
Output Voltage Range
• 4.7 MHrs MTBF
Output Current
• Low, Low Cost!
Output Current Accuracy
Vin = 24V
±5.0
±8.0
%
Output Current Stability
Vin = 24V
±5.0
±10.0
%
470
µF
Vin = 36V
2
See Model Selection Guide
Output Capacitive Load
Efficiency
Iout = 100%
Temperature Coefficient
Output Short Circuit
95
%
±0.03
%/ºC
Units
Regulated At Rated Output Current
Environmental
Parameter
Conditions
Operating Temperature Range, Ambient
Min.
Typ.
Max.
300 mA, 350 mA Output Models
-40
+25
+85
All Other Models
-40
+25
+71
Operating Temperature Range, Case
Case
Storage Temperature Range
-55
Cooling
ºC
+100
ºC
+125
ºC
Free Air Convection
Humidity
Lead Temperature
RH, Non-condensing
95
%
1.5 mm From Case For 10 Sec
260
ºC
Physical
Case Size
0.90 x 0.40 x 0.374 Inches (22.80 x 10.20 x 9.50 mm)
Case Material
Non-Conductive Black Plastic (UL94-V0)
Weight
0.123 Oz (3.5g)
Remote On/Off Control
Parameter
MicroPower Direct
292 Page Street
Suite D
Stoughton, MA 02072
USA
T: (781) 344-8226
F: (781) 344-8481
E: [email protected]
W: www.micropowerdirect.com
Conditions
Min.
Typ.
Max.
Units
DC/DC On
Open 0r 2.8V < Vcont <6.0V
DC/DC Off
Vcont <0.6V
Remote Pin Drive Current
Quiescent Input Current (Shutdown Mode)
Vcont = 5.0V
Vin = 24V, Vcont = <0.6V
1
mA
400
µA
Max.
Units
10
kHz
PWM Dimming
Parameter
Conditions
Operation Frequency
Min.
Typ.
0.2
Reliability Specifications
Parameter
MTBF
Safety Standards
Conditions
MIL HDBK 217F, 25ºC, Gnd Benign
Min.
Typ.
2.0
Max.
Units
MHours
Meets EN 60950, IEC 60950
www.micropowerdirect.com
www.micropowerdirect.com
Model Selection Guide
Model
Number
LD24E-07-300
LD24E-08-350
LD24E-12-500
LD24E-14-600
LD24E-17-700
Input
Voltage (VDC)
Output
Voltage
Current
(mA)
0.0 - 300
0.0 - 350
0.0 - 500
0.0 - 600
0.0 - 700
Nominal
Range
(VDC)
24
24
24
24
24
5.5 - 36.0
5.5 - 36.0
5.5 - 36.0
5.5 - 36.0
5.5 - 36.0
2.0 - 32.0
2.0 - 32.0
2.0 - 32.0
2.0 - 32.0
2.0 - 32.0
Dimming
Control
Efficiency
(%, Max)
PWM
PWM
PWM
PWM
PWM
95
95
95
95
95
Specification Notes:
1. Exceeding 40V on the unit input could damage the unit.
2. No connection should be made between input ground and the
output.
3. These are step-down devices, the maximum output open voltage
is equal to the input voltage.
4. The PWM/Cont input (Pin 3) should be left open if not used.
5. Exceeding the specified maximum output power could cause damage
to the unit.
Typical Connection:
Connection Notes:
1. In some noise sensitive applications, the addition of the
input filter components (C1, L1 & C2) will help to reduce
conducted emissions.
2. Input gnd (Pin 4) cannot be connected to the output.
3. If not being used, the PWM/Control input (Pin 3) should
be left open.
Typical Connection: Parallel Output
Connection Notes:
1. A positive temperature coefficient PTC is connected to
each parallel channel for protection.
Pin Connections
PWM Output Current Control
Mechanical Dimensions
Pin
Function
1
3
4
5
6
+VIN
+DC Supply
PWM
PWM, On/Off
Gnd
-DC Supply
-VOUT LED Cathode Conn.
+Vout LED Anode Conn.
Output current may be
adjusted by using a
pulse width modulated
(PWM) signal. By varying the signal duty cycle
(as shown at right)
the output current is
adjusted up or down.
Output current may be calculated by the formula:
IOUT = IRATED x DPWM
Where Iout = Required output current
Irated = Full rated output current for the unit
Dpwm = Duty cycle of the control signal
MicroPower Direct
Notes:
• All dimensions are typical in inches (mm)
• Tolerance x.xx = ±0.01 (±0.25)
• Pin 1 is marked by a “dot” or indentation on the top of the unit
We Power Your Success - For Less!
292 Page Street Ste D Stoughton, MA 02072
•
TEL: (781) 344-8226
•
FAX: (781) 344-8481
•
E-Mail: [email protected]
Similar pages