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DS3992Z-18N+R Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS3992Z-18N+R Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 13 page General Description The DS3992 is a low-cost, two-channel controller for cold-cathode fluorescent lamps (CCFLs) that are used to backlight liquid crystal displays (LCDs). The DS3992 can drive multiple CCFLs per channel, making it ideal for 4- and 6-lamp LCD PC monitor and TV applications. The DS3992 uses a push-pull drive scheme to convert a DC voltage (5V to 24V) to the high voltage (300VRMS to 1400VRMS) AC waveform that is required to power the CCFLs. The push-pull drive scheme uses a minimal number of external components, which reduces compo- nent and assembly cost and makes the printed circuit board (PC board) design easy to implement. The push- pull drive scheme also provides an efficient DC-to-AC conversion and produces near-sinusoidal waveforms. Applications LCD PC Monitors LCD-TVs Features o Two-Channel CCFL Controller for Backlighting LCD Panels for PC Monitors and LCD-TVs o Minimal BOM Provides Low-Cost Inverter Solution o Per-Channel Lamp Fault Monitoring for Lamp- Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions o Accurate (±10%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz) o Accurate (±10%) On-Board Oscillator for DPWM Burst-Dimming Frequency (90Hz to 220Hz or 180Hz to 440Hz) o Device Supply Undervoltage Lockout o Inverter Supply Undervoltage Lockout o Burst-Dimming Soft-Start Minimizes Audible Transformer Noise o Strike Frequency Boost o 100% to < 10% Dimming Range o 4.5V to 5.5V Single-Supply Operation o -40°C to +85°C Temperature Range o 16-Pin SO Package (150 mils) Two-Channel, Push-Pull CCFL Controller ______________________________________________ Maxim Integrated Products 1 1 2 SO-150 TOP VIEW 3 4 5 6 7 8 14 13 16 15 12 11 10 9 OVD2 LCM1 OVD1 GA2 VCC VCC GA1 GB1 POSC LOSC GB2 VCC GND SVM BRIGHT LCM2 DS3992 Pin Configuration Rev 0; 9/06 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. + Denotes lead-free package. T&R denotes tape-and-reel package. Ordering Information PART TEMP RANGE DIMMING FREQUENCY RANGE BRIGHT POLARITY PIN-PACKAGE DS3992Z-09P+ -40°C to +85°C 90Hz to 220Hz Positive 16 SO-16 (150 mils) DS3992Z-09N+ -40°C to +85°C 90Hz to 220Hz Negative 16 SO-16 (150 mils) DS3992Z-18P+ -40°C to +85°C 180Hz to 440Hz Positive 16 SO-16 (150 mils) DS3992Z-18N+ -40°C to +85°C 180Hz to 440Hz Negative 16 SO-16 (150 mils) DS3992Z-09P+T&R -40°C to +85°C 90Hz to 220Hz Positive 16 SO-16 (150 mils) DS3992Z-09N+T&R -40°C to +85°C 90Hz to 220Hz Negative 16 SO-16 (150 mils) DS3992Z-18P+T&R -40°C to +85°C 180Hz to 440Hz Positive 16 SO-16 (150 mils) DS3992Z-18N+T&R -40°C to +85°C 180Hz to 440Hz Negative 16 SO-16 (150 mils) Typical Operating Circuits appear at end of data sheet. |
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