DMA22734 Specifications and Applications Information Two Lamp DC to AC Inverter 12/28/10 The ERG DMA22734 (DMA Series) DC DMA Series to AC inverter features onboard connectors and can be easily dimmed using an external pulse-width modulated control signal. This unit is less than 13mm in height and the two mounting holes make installation very straight forward. DMA Package Powered by a regulated +5 volt DC source the DMA22734 is specially designed to power the Sharp LQ104S1DG21 backlight. PCB components are shown for reference only. Actual product may differ from that shown. Package Configuration Product Features Small Package Size, less than 13mm in height High Efficiency Made in U.S.A. .12 [2,9] .500 [12,70] J3 1 1 J2 4.28 [108,7] MAX Connectors J1 - Input J2, J3 - Outputs MOLEX 53261-0871 JST SM02(8.0)B-BHS-1-TB 3.375 [85,72] Pinouts J1-1 J1-2 J1-3 J1-4 J1-5 J1-6 J1-7 J1-8 +Vin +Vin GND GND Enable/PWM N/C N/C N/C J2-1 J2-2 ACout ACreturn .120 [3,05] Dia. (2x) J1 .42[10,5] 1 J3-1 J3-2 ACout ACreturn .50 [12,7] MAX Weight: 30 grams PCB components are shown for reference only. Actual product may differ from that shown. .880 [22,35] MAX DMA22734 Absolute Maximum Ratings Rating Symbol Value Units Input Voltage Range V in -0.3 to +5.5 V dc Storage Temperature T stg -40 to +85 o C Operating Characteristics With a load simulating the referenced display and lamp warm-up of 5 minutes. Unless otherwise noted Vin = 5.00 Volts dc and Ta = 25oC. Characteristic Symbol Min Typ Max Units Input Voltage V in +4.50 +5.00 +5.25 V dc Component Surface (note 1) Temperature Ts -20 - +80 Input Current (note 2) I in - 1.38 1.60 A dc Input Ripple Current I rip - - - mA pk-pk Fo 35 40 45 kHz V out (min) 1450 - - Vrms h - 84 - % Output Current (per lamp) I out - 6.2 - mArms Output Voltage Vout - 467 - Vrms V thoff GND - 0.7 V dc 2.0 - Vi n V dc Operating Frequency Minimum Output Voltage (note 3) Efficiency o C Enable Pin Turn-off Threshold Turn-on Threshold V thon Specifications subject to change without notice. (Note 1) Surface temperature must not exceed 80 degrees C; thermal management actions may be required. (Note 2) Input current in excess of maximum may indicate a load/inverter mismatch condition, which can result in reduced reliability. Please contact ERG technical support. (Note 3) Provided data is not tested but guaranteed by design. Application Notes: 1) The minimum distance from high voltage areas of the inverter to any conductive material should be .12 inches per kilovolt of starting voltage. 2) Mounting hardware to be non-conductive. 3) Open framed inverters should not be used in applications at altitudes over 10,000 feet. 4) ACreturn should be left floating, not grounded. 5) Contact ERG for possible exceptions. DMA22734 Pin Descriptions Vin Input voltage to the inverter. Both pins should be connected for optimum reliability and efficiency. GND Inverter ground. Both pins should be connected for optimum reliability and efficiency. Enable A positive voltage will turn the inverter on. Grounding this pin will turn the inverter off. Application information This inverter is designed to power up to two cold cathode fluorescent lamps. The enable input allows on /off control of the inverter. An external PWM source applied to this enable input will provide CCFL dimming. Special Application +Vin +Vin + ACreturn (1) GND GND GND Enable + Disable - (2) VPWM ACout +Vin (4) (3) ACout ACreturn Enable / Disable or PWM Input 5% - 100% 0 approx. 5 ms* Low ESR type input by-pass capacitor (22 uF - 100 uF) may be required to reduce reflected ripple. VPWM from 2.4V to less than or equal to +Vin. Full brightness without PWM control requires that pin 5 be tied to +Vin, Pin 5 must be at 0V to turn off. Duty Cycle 5% - 100%. search Gr Re R 13 M (R) c. RE UL p, In ou Endi co tt Note 1 Note 2 Note 3 Note 4 IS G I I O S TE RE D F 3 900 A3 1 Endicott Research Group, Inc. (ERG) reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by ERG is believed to be accurate and reliable. However, no responsibility is assumed by ERG for its use.