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CA3338CE Supplier, CA3338CE on Stock |
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| CA3338CE CA3338CE PDF 2. At the condition of YL =250cd/m2 3. Lamp frequency may produce interference with horizontal synchronous frequency, and this may cause horizontal beat on the display. Therefore lamp frequency shall be detached as much as possible from the horizontal synchronous frequency and from the harmonics of horizontal synchronous to avoid interference. 4. The open output voltage of the inverter shall be maintained for more than 1s; otherwise the lamp may not be turned on. 5. a) Since the lamp is consumable, the life time written above is referential value and it is not guaranteed in this specification sheet by WEDC. Lamp life time is defined that it applied either 1) or 2) under this condition (Continuous turning on at TA=25C, IL=6mA rms) 1) Brightness becomes 50% of the original value under standard condition. 2) Kick-off voltage at TA=0C exceeds maximum value, 1400 V rms. b) If operating under lower temp environments, the lamp exhaustion is accelerated and the brightness becomes lower. (Continuous operating for up to 1 month under lower temp conditions may reduce the brightness to 50%.) If using in lower temp environments, periodic lamp exchange by Panelview is recommended 6. The performance of the backlight, for example life time or brightness, is extremely influenced by the characteristics of the DC-AC inverter for the lamp. When designing or ordering the inverter, make certain that poor lighting caused by the mismatch of the backlight and the inverter (mislighting, flicker, etc.) do not occur. Once this is confirmed, the module should be operated in the same condition as it is installed in the instrument. Recommended inverter is CXA-0217,CXA-0247 or CXA-0231 (TDK corporation) 7. It is required to have the inverter designed to allow the impedance deviation of the two CCFT lamps and the capacity deviation of barast capacitor. CA3338CE Datasheet Gate-to-Source Forward Leakage Gate-to-Source Reverse Leakage Forward Transconductance Total Gate Charge Pre-Vth Gate-Source Charge Post-Vth Gate-Source Charge Gate-to-Drain Charge Gate Charge Overdrive Switch Charge (Qgs2 + Qgd) Output Charge Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Input Capacitance Output Capacitance Reverse Transfer Capacitance CA3338CE Suppliers If LDB is LOW, on the rising edge of WCLKB data present on BIN11-0 is written into the PAFB or PAEB register depending on ADDRB (see Table 2). The LSB, BIN0, corresponds to the LSB of PAFB and PAEB registers. The MSB, BIN11, corresponds to the MSB of PAFB and PAEB registers. The LT®1943 quad output adjustable switching regulator provides power for large TFT LCD panels. The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel. Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output VLOGIC with up to 2A current. A high-power step-up converter, a lower- power step-up converter and an inverting converter pro- vide the three independent output voltages AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures VON is disabled if any of the four outputs are more than 10% below normal voltage. Notes: 1. Test conditions assume signal transition times of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V and output loading specified in Figure 1. 2. Tested with the load in Figure 2. Transition is measured 500 mV from steady-state voltage. Not 100% tested. 3. Not 100% tested. Start Up Into a Full Load With Supply Voltages as Low as 0.9 V Over Full Temperature Range Minimum 100-mA Output Current From 0.8 V Supply Voltage High Power Conversion Efficiency, up to 90% Power-Save Mode for Improved Efficiency at Low Output Currents Device Quiescent Current Less Than 50 µA Added System Security With Integrated Low-Battery Comparator To generate the PWM waveform, the control voltage from the error amplifier is compared to a current sense signal which represents the peak output inductor current (Figure 2). An increase in VCC causes the inductor current slope to increase, thus reducing the duty cycle. This is an inherent feed-forward characteristic of current mode control, since the control voltage does not have to change during changes of input supply voltage. |
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