WRA_LT-3W & WRB_LT-3W Series
3W, WIDE INPUT, ISOLATED & REGULATED SINGLE/DUAL OUTPUT DC/DC CONVERTER
multi-country patent protection RoHS
清算审计FEATURES
怎么洗葡萄PRODUCT PROGRAM
Input
Output Voltage (VDC) Current (mA) Part Number Nominal Range
Max.** Voltage
(VDC)
Max. Min. Efficiency (%, Typ.)化能合成作用
WRA1205LT-3W * ±5 ±300 ±30 76 WRA1212LT-3W * ±12 ±125 ±13 80 WRA1215LT-3W * ±15 ±100 ±10 80 WRB1203LT-3W * 3.3 833 83 72 WRB1205LT-3W * 5 600 60 74 WRB1212LT-3W * 12 250 25 78 WRB1215LT-3W * 12
9-18
22
15 200 20 80 WRA2405LT-3W ±5 ±300 ±30 76 WRA2412LT-3W * ±12 ±125 ±13 80 WRA2415LT-3W * ±15 ±100 ±10 80 WRB2403LT-3W * 3.3 833 83
74 WRB2405LT-3W * 5 600 60 76 WRB2412LT-3W * 12 250 25 80 WRB2415LT-3W * 24
18-36
40
15 200 20 80 WRA4805LT-3W * ±5 ±300 ±30 76 WRA4812LT-3W *
±12 ±125 ±13 80 WRA4815LT-3W * ±15
±100 ±10 80 WRB4803LT-3W * 3.3 833 83 74 WRB4805LT-3W * 5 600 60 76 WRB4812LT-3W * 12 250 25 80 WRB4815LT-3W *
48
36-72人生领悟
80
15
200
20
80 *Designing.
**Input voltage can ’t exceed this value, or will cau the permanent damage.
COMMON SPECIFICATIONS
Item
Test conditions
Min. Typ. Max. Units Storage humidity range 95 %
Operating temperature -40 85 Storage temperature -55 125 Temp. ri at full load
15 Lead temperature 1.5mm from ca for 10 conds
245
°C Short circuit protection Continous, automatic recovery
Cooling
Free air convection Package material猕猴桃品种
Epoxy Resin (UL94-V0) MTBF 1000
K hours
Weight
员工股权激励
5.2
g
Wide (2:1) input range
Operating temperature: -40°C ~ +85°C 1500VDC isolation No heat sink required Internal SMD construction MTBF>1,000,000 hours
Short circuit protection(Automatic recovery) Industry standard pinout RoHS Compliance
APPLICATIONS
The WRA_LT-3W & WRB_LT-3W Series are specially designed for applications where a wide range input voltage power supplies are isolated from the input power supply in a distributed power supply system on a circuit board. The products apply to:
1) Where the voltage of the input power supply is
wide range(voltage range ≤2:1);
2) Where isolation is necessary between input and output (Isolation Voltage ≤1500VDC); 3) Where the regulation of the output voltage
and the output ripple noi are demanded.
MODEL SELECTION WRB2412LT-3W
Product Series Input Voltage Output Voltage Package Style Rated Power超难灯谜
MORNSUN Science & Technology co.,Ltd.
Address: 2th floor 6th building, Huangzhou Industrial
District, Guangzhou, China Tel: 86-20-38601850 Fax: 86-20-38601272 Http://
Item
Test conditions Min. Typ.
Max.
Units Isolation voltage Tested for 1 minute and 1mA max. 1500
VDC Isolation resistance Test at 500VDC 1000 M Ω Isolation Capacitance
Input/Output
85 pF
Item
Test conditions
Min. Typ. Max. Units Output power
See above products program
0.3 3 W
Positive voltage accuracy Refer to recommended circuit ±1 ±3 Negative voltage accuracy Refer to recommended circuit ±3 ±5 Load regulation From 10% to 100% load ±0.5 ±1* Line regulation
Input voltage from low to high ±0.2 ±0.5 %
Temperature Drift (Vout) Refer to recommended circuit ±0.03 %/°C
Output ripple& noi** 20MHz Bandwidth
35 75 mVp-p Switching frequency
100% load, nominal input voltage
300
KHz
*Dual output models unbalanced load: ±5%.
**Test ripple and noi by “parallel cable ” method. See detailed operation instructions at T esting of Power Converter ction, application notes.
Operating Temp.( )
C
Recommended Reflow Profile
T e m p e r a t u r e ()
℃245℃
RECOMMENDED CIRCUIT
Requirement On Output Load
In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified range of input voltage is not exceeded, the minimum output load no less than 10% load. If the actual load is less than the specified minimum load, the output ripple may increa sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, plea add an appropriate resistor as extra loading, or contact our company for other lower output power products.
Recommended Circuit
All the WRA_LT-3W & WRB_LT-3W Series have been tested according to the following recommended testing circuit before leaving factory. This ries should be tested under load. (See Figure 1).
企业简介怎么写If you want to further decrea the input/output ripple, you can increa capacitance properly or choo capacitors with low ESR. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might ari. For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor es (Table 1). General: Cin: 12V 100μF
24V&48V 10μF~47μF
Cout: 10μF/100mA
Input Current
When it is ud in unregulated power supply, be sure that the fluctuating range of the power supply and the rippled voltage do not exceed the module standard. Input current of power supply should afford the flash startup current of this kind of DC/DC module. (Figure 2) General: Ip ≤1.4*Iin-max:
No parallel connection or plug and play
DC DC
Vin
0V
Cin
Vin
GND
0V Cin
DC DC
(Figure 1)
I n p u t C u r r e n t (A )
Input Voltage Range
Ip
(Figure 2)
Output External Capacitor Table(Table 1) Single Vout (VDC) Cout (uF) Dual Vout (VDC)
Cout
(uF) 3.3 2200 ±5 680 5 1000 ±9 470 9 680 ±12 330 12 470 ±15 220 15 330 - -
Note: 1. The load shouldn't be less than 10%, otherwi ripple will increa dramatically. 2. Operation under 10% load will not damage the converter; However, they may not meet all specification listed. 3. All specifications measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwi specified. 4. In this datasheet, all the test methods of indications are bad on corporate standards. 5. Only typical models listed, other models may be different, plea contact our technical person for more details.
