RSG RSG Electronic Components GmbH Sprendlinger Landstr. 115 D-63069 Offenbach/Germany Tel. +49 69 984047-0 Fax +49 69 984047-77 [email protected] www.rsg-electronic.de ■ ■ ELECTRONIC COMPONENTS ■ ■ ■ ■ Änderungen vorbehalten / subject to change without notice B_LT-2W Series FIXED INPUT ISOLATED & UNREGULATED 2W SINGLE OUTPUT ULTRAMINIATURE SMD PACKAGE FEATURES multi -country patent protection RoHS PRODUCT PROGRAM ● High Efficiency up to 85% ● SMD Package Style ● Single Output Voltage ● High Power Density ● Industry Standard Pin out ● No Heatsink Required ● 1KVDC Isolation ● Temperature Range: -40°C~+85°C ● No External Component Required ● Custom Service Available ● RoHS Compliance Part Number Input Voltage (VDC) Nominal Range Voltage (VDC) Output Current (mA) Min Max B0505LT-2W 5 400 40 B0509LT-2W 9 222 23 12 167 17 B0515LT-2W 15 133 14 B1205LT-2W 5 400 40 B0512LT-2W B1209LT-2W B1212LT-2W 5 4.5~5.5 12 10.8~13.2 B1215LT-2W 9 222 23 12 167 17 15 133 14 Efficiency (%, Typ) Package Style 81 82 84 84 82 83 85 85 SMD SMD SMD SMD SMD SMD SMD SMD APPLICATIONS The B_LT-2W Series are specially designed for applications where a single power supply is isolated from the input power supply in a distributed power supply system on a circuit board. These products apply to: 1) Where the voltage of the input power supply is fixed (voltage variation ≤±10%); 2) Where isolation is necessary between input and output (isolation voltage =1000VDC); 3) Where the regulation of the output voltage and the output ripple noise are not demanding. Such as: purely digital circuits, ordinary low frequency analog circuits, and IGBT power device driving circuits. COMMON SPECIFICATIONS Short circuit protection Temperature rise at full load Cooling Operating temperature range Storage temperature range Lead temperature Storage humidity range Case material MTBF 1 second 25°C MAX, 15°C TYP Free air convection -40°C~+85°C -55°C ~+125°C 260°C ≤95% Plastic (UL94-V0) >3,500,000 hours ISOLATION SPECIFICATIONS Item Isolation voltage Isolation resistance Test conditions Tested for 1 minute and 1mA max Test at 500VDC Min 1000 1000 Typ Max Units VDC MΩ TYP Units W % OUTPUT SPECIFICATIONS MODEL SELECTION B0505LT- 2W Rated Power Package Style Output Voltage Input Voltage Product Series Item Output power Line regulation Load regulation Test conditions For Vin change of 1% 10% to 100% load (3.3V,5V output) 12.8 MAX 2 1.2 15 10% to 100% load (9V output) 8.3 15 10% to 100% load (12V output) 6.8 15 10% to 100% load (15V output) 6.3 15 Output voltage accuracy See tolerance envelope graph Temperature drift 100% full load MIN 0.2 0.03 Output ripple 20MHz Bandwidth 75 150 Noise 20MHz Bandwidth 150 250 Switching frequency Full load, nominal input 70 % %/°C mVp-p KHz Note: 1.All specifications measured at TA=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2.See below recommended circuits for more details. MORNSUN reserves the copyright For any design change and upgrade, we will not make any prior notification A/1-2007 Page 1 of 2 TYPICAL CHARACTERISTICS Filtering In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC output end and input end to reduce the noise and ripple. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees the external capacitor table. To get an extremely low ripple, an “LC” filtering network may be connected to the input and output ends of the DC/DC converter, which may produce a more significant filtering effect. It should also be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid mutual interference (Figure 1). Ambient Temperature ( C ) RECOMMENDED REFLOW SOLDERING PROFILE Peak .Temp 260℃ 1 0 Sec Max 250 220℃ Te mper at ur e (℃ ) 200 90 Sec Max ( >220 ℃) 150 100 L L +Vo Vin DC DC C 50 C GND 0V （Figure 1） 0 Tim e (s ec. ) Output Voltage Regulation and Over-voltage Protection Circuit PIN CONNECTIONS Pin 1 Function GND 2 Vin 3 NC 5 NC 6 0V 8 7 + Vo N C 9 NC 10 NC 12 13 14 NC NC NC The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (Figure2). OUTLINE DIMENSIONS& RECONMENDED FOOTPRINT DETAILS +Vout 0V (0.1± 0.004) (0.11) (0.01) (0.01) (0.05) REG Vin 0.25 0.2 5 2.54±0.1 0 .6±0 .0 5 0.0 2±0 .0 02 1.27 0V (Figure2) 0.50 (0.02) Overload Protection 。 5.00 MAX 1 2 3 5 6 7 15.24 (0.6) 17.78 (0.7) +Vout DC DC GND 10 9 8 12.7 (0.5) ( 0.7±0 .01) DC DC A 14 1312 17.78±0. 25 REG GND (0.2 3) (0.24) 5.75 6.00 2.75 Vin 1.30 ±0.13 (0. 05±0.005) Under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. The simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. Note: All Pins on a 2.54mm(0.1) pitch; All Pin Widths are 0.60 mm(0.02); Tolerances:±0.15mm(0.006); Unit: mm(inch). EXTERNAL CAPACITOR TABLE APPLICATION NOTE Requirement on output load To ensure this module can operate efficiently and reliably, a minimum load is specified for this kind of DC/DC converter in addition to a maximum load (namely full load). During operation, make sure the specified range of input voltage is not exceeded, the minimum output load is not less than 10% of the full load, and that this product should never be operated under no load! If the actual output power is very small, please connect a resistor with proper resistance at the output end in parallel to increase the load, or use our company’s products with a lower rated output power (B_T-1W series). MORNSUN reserves the copyright Vin External capacitor Vout External capacitor 5VDC 4.7uF 5VDC 4.7uF 12VDC 2.2uF 9VDC 2.2uF -- -- 12VDC 1uF -- -- 15VDC 0.47uF It’s not recommend to connect any external capacitor in the application field with less than 0.5 watt output。 For any design change and upgrade, we will not make any prior notification A/1-2007 Page 2 of 2