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DS3992

Features: · Two-Channel CCFL Controller for BacklightingLCD Panels for PC Monitors and LCD-TVs· Minimal BOM Provides Low-Cost Inverter Solution· Per-Channel Lamp Fault Monitoring for Lamp- Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions· Accurate (±10%) On-Board Oscillator fo...

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SeekIC No. : 004329092 Detail

DS3992: Features: · Two-Channel CCFL Controller for BacklightingLCD Panels for PC Monitors and LCD-TVs· Minimal BOM Provides Low-Cost Inverter Solution· Per-Channel Lamp Fault Monitoring for Lamp- Open, Lam...

DS3992 Data Sheet

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Part Number:
DS3992
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Two-Channel CCFL Controller for Backlighting
LCD Panels for PC Monitors and LCD-TVs
· Minimal BOM Provides Low-Cost Inverter Solution
· Per-Channel Lamp Fault Monitoring for Lamp- Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions
· Accurate (±10%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz)
· Accurate (±10%) On-Board Oscillator for DPWM Burst-Dimming Frequency (90Hz to 220Hz or 180Hz to 440Hz)
· Device Supply Undervoltage Lockout
· Inverter Supply Undervoltage Lockout
· Burst-Dimming Soft-Start Minimizes Audible Transformer Noise
· Strike Frequency Boost
· 100% to < 10% Dimming Range
· 4.5V to 5.5V Single-Supply Operation
· -40°C to +85°C Temperature Range
· 16-Pin SO Package (150 mils)


Application

LCD PC Monitors
LCD-TVs


Pinout

Connection Diagram


Specifications

Voltage on VCC Relative to Ground...................-0.5V to +6.0V
Voltage on Any Leads Other
Than VCC ..............0.5V to (VCC + 0.5V), not to exceed +6.0V
Operating Temperature Range ......................-40°C to +85°C
Storage Temperature Range .......................-55°C to +125°C
Soldering Temperature.............. See J-STD-020 Specification


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 component and assembly cost and makes the printed circuit board (PC board) design easy to implement. The pushpull drive scheme also provides an efficient DC-to-AC conversion and produces near-sinusoidal waveforms.




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