mic4834 Micrel Semiconductor, mic4834 Datasheet
mic4834
Available stocks
Related parts for mic4834
mic4834 Summary of contents
Page 1
... General Description The MIC4834 is a low noise dual Electroluminescent (EL) Panel driver used in backlighting applications. The MIC4834 converts a low DC voltage to a high DC voltage using a boost converter and then alternates the high DC voltage across the EL panels using an H-bridge. The MIC4834 incorporates internal wave-shaping circuitry specifically designed to reduce audible noise emitted by EL panels ...
Page 2
... EL Panel B output: Connect the other end of the EL panel B to this pin. EL Panel A output: Connect the other end of the EL panel A to this pin. Heat Sink Pad. Connect to ground externally. MLF® package only. 2 Lead Finish Pb-free / RoHS-Compliant Pb-free / RoHS-Compliant 10-Pin MSOP – Top View resistor to GND shuts down the device. SW M9999-100908-A MIC4834 ...
Page 3
... JA MSOP (θ )……………………......................... 206°C/W JA ≤ 85°C. J Min 2.3 = 105V; = 5.8V = 105V 250 165 80 2.5 0.4 20 MIC4834 DD Typ Max Units 5.8 V 152 220 µA 0.1 1 µA 6.0 12.0 Ω 120 109 ...
Page 4
... INPUT VOLTAGE (V) Brightness vs. Input Voltage Distance = 135kHz 225Hz 220µ 2.5 3 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) 4 MIC4834 Total Input Current vs. Input Voltage 225Hz 2.2nF OUT 94kHz Size = 2in 116kHz ...
Page 5
... Micrel Functional Diagram Functional Description Overview The MIC4834 is a high-voltage dual output EL driver with a peak-to-peak AC output voltage of 220V capable of 2 driving two panels. The MIC4834 drives EL panels by converting a low DC input voltage to a high DC high output voltage using the boost regulator circuit and then alternating the high DC voltage across the EL panel using an H-Bridge ...
Page 6
... The control circuit will continue to turn the MOSFET’s on and off to maintain a constant DC voltage at the CS pin. When the MIC4834 EL Driver is enabled, ELA and ELB will switch in opposite states with COM to achieve a 220V peak-to-peak AC output signal needed to drive the two EL panels ...
Page 7
... Micrel Application Information The MIC4834 is designed to use an inductance with a value between 100µH to 330µH. Choosing the right inductor is always a balance of size, inductance, efficiency, current rating and cost. A TDK (VLS4012T- 221M) 220µH inductor is recommended based on size, efficiency and current rating. ...
Page 8
... VLS4012T-221M D1 BAS20-V-GS18 CRCW06033323FKEYE3 SW U1 MIC4834YML Notes: 1. TDK: www.tdk.com 2. Vishay: www.vishay.com 3. Micrel, Inc .: www.micrel.com October 2008 Figure 6. Typical Li-Ion Powered MIC4834 Circuit Note: Table 2 applies to circuit shown in Figure 0 (kΩ) 357 392 487 SW f (kHz) 128 116 ...
Page 9
... Micrel Layout Recommendation (MLF October 2008 ® ) Top Layer Bottom Layer 9 MIC4834 M9999-100908-A ...
Page 10
... Micrel Layout Recommendation (MSOP) October 2008 Top Layer Bottom Layer 10 MIC4834 M9999-100908-A ...
Page 11
... Micrel Package Information October 2008 ® 10-Pin 3mm x 3mm MLF (ML) 11 MIC4834 M9999-100908-A ...
Page 12
... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully October 2008 10-Pin MSOP (MM) indemnify Micrel for any damages resulting from such use or sale. © 2008 Micrel, Incorporated. 12 MIC4834 M9999-100908-A ...