DMD43246 LQ150X1LGB1 SM02B-BHSS-1-TB - Datasheet Archive

 

Specifications and Applications Information 06/21/07 Four Lamp DC to AC Inverter Preliminary Package Configuration 1.03 [26,2]

 

DMD43246 DMD43246 Specifications and Applications Information 06/21/07 Four Lamp DC to AC Inverter Preliminary Package Configuration 1.03 [26,2] MAX Output (4x) 1 1 J1 Powered by a regulated +12 Volt DC source, the DMD43246 DMD43246 is designed to power the backlight of the Sharp LQ150X1LGB1 LQ150X1LGB1. .809 [20,54] PCB components are shown for reference only. Actual product may differ from that shown. The ERG DMD43246 DMD43246 (DMD Series DC to AC inverter DMD Series) features onboard connectors and can be easily dimmed using the onboard PWM Dimming or an external PWM generator. J3 .160 [4,0] Dia. (2x) 6.69 [169,9] MAX Product Features Input J2 1 Small Package Size, lass than 13mm in height High Dimming Ratio 5.012 [127,30] High Efficiency Made in U.S.A. J4 J5 1 1 .24 [6,1] .555 [14,09] Mass: 45 grams Pin Descriptions DMD Package PCB components are shown for reference only. Actual product may differ from that shown. J4-1 ACout J4-2 ACreturn Connectors Output JST SM02B-BHSS-1-TB SM02B-BHSS-1-TB J1-1 ACout J1-2 ACreturn Input Molex 53261-0871 J2-1 J2-2 J2-3 J2-4 J2-5 J2-6 J2-7 J2-8 Vin Vin GND GND Enable Control GND GND J3-1 ACout J3-2 ACreturn J5-1 ACout J5-2 ACreturn page 1. DMD43246 DMD43246 Absolute Maximum Ratings Rating Symbol Value Units Input Voltage Range Vin -0.3 to +13.2 V dc Storage Temperature Tstg -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 = 12.00 Volts dc and Ta = 25oC. Characteristic Symbol Min Typ Max Units Input Voltage V in +10.8 +12.0 +12.6 V dc Component Surface (Note 2) Temperature Ts -20 - +80 Input Current (Note 1) I in - 1.62 1.90 A dc Input Ripple Current l rip - 20 - mA pk-pk Operating Frequency Fo 34 39 44 kHz Vout (min) 1500 - - Vrms h - 87 - % Output Current (per lamp) I out - 6.5 - mArms Output Voltage Vout - 615 - Vrms Turn-off Threshold V thoff GND - 0.5 V dc Turn-on Threshold V thon 2.0 - Vi n V dc Impedance to Vin R Enable 9.5 10.0 10.5 kOhms Minimum Output Voltage (Note 3) Efficiency o C Enable Pin Specifications subject to change without notice. (Note 1) 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 2) Surface temperature must not exceed 80 degrees C; thermal management actions may be required. (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) Contact ERG for possible exceptions. page 2. DMD43246 DMD43246 Onboard PWM Unless otherwise noted Vin = 12.00 Volts DC, Ta = 25 oC and unit has been running for 5 minutes. Characteristic Symbol Min Typ Max Units Frequency f pwm - 160 - HZ Control Input Bias Current I cb i a s - - 10 uA Pin Descriptions Vin Input voltage to the inverter. The two pins should be connected for optimum reliability and efficiency. GND Inverter ground. The four pins should be connected for optimum reliability and efficiency. Control Analog voltage input to the onboard pulse width modulator. Decreasing this voltage increases the ON time of the onboard PWM resulting in increased brightness. The inverter is full ON when this voltage is near inverter ground. Enable Inverter Enable. Pull this pin low to disable inverter operation. This pin must be high to enable the inverter. The onboard PWM is always utilized. Application information The DMD series of inverters is designed to power up to four cold cathode fluorescent lamps. An external analog control interfaces with an onboard pulse width modulator to provide dimming control. The DMD inverter can reliably dim to less than 5% duty cycle. External shutdown of the inverter is accomplished using the Enable pin. Pulling this pin low (below Vthoff) disables the inverter. Enabling the inverter is accomplished by pulling this pin high (above Vthon). If analog voltage dimming is required, the analog voltage is applied to the Control pin. Figure 1 shows how to connect the inverter for onboard PWM operation. Graph 1 shows the relationship of PWM duty cycle to input control voltage. If an external PWM is used, simply connect the Enable pin to the PWM source and connect the Control pin to inverter Ground. If the onboard PWM is used, connect the analog voltage to the Control pin. page 3. DMD43246 DMD43246 Control Voltage vs. Duty Cycle 100% Duty Cycle (%) 80% 60% 40% 20% 0% 0 1 2 3 4 5 Control Voltage (V) Graph 1 Typical Application +12V J4 J5 J1 J3 ACreturn ACreturn Control 0V Full ON 5V Full OFF ACreturn ACreturn search Gr Re R 13 M ® c. RE UL p, In ou Endi co tt Figure 1 IS G 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. page 4.