Download The LCD panel power

EUP2681
Internal integration charge pump, operational amplifiers and high-voltage switch
For tft-lcd DC - DC converter
overview
EUP2681 is a used laptop tft-lcd monitors or the special chip power panel, its input dc voltage
range: 2.5 V - 5.5 V. The chip inside integrated a boost converter, negative and positive pump,
rapid VCOM buffers and high voltage switch four parts.
Boost converter power switch tube, with $350 A peak currents on it, Adopts fixed frequency peak
current mode control technology, combined with external frequency compensation function that
the rapid response characteristic and the load to compensate, Using high-speed switching
frequency, 1.2 MHz greatly reduced the inductance and capacitance values for saving cost and
PCB area provides favorable conditions, At the same time, it also provides the voltage protection,
over-voltage protection, over-current protection, thermal protection functions, ensuring safe and
reliable work. Chip,
Negative and positive pump can be adjusted according to user requirements, flexible as pressure
coefficient to produce both positive and negative, to supply power tft-lcd gate drive chip power
supply.
High-speed VCOM buffer characteristics are mainly: 500mA 20MHz bandwidth of short-circuit
current, and 45V/maximum tire-road friction coefficient s pressure pendulum and the rail rail of
input and output voltage range.
High voltage switch control circuit can be adjusted grid driving voltage, the slope TFT screens
driving voltage, so as to improve the picture quality.
EUP2681 using 24 foot TQFN packaging, packaging area is 4mm x 4mm. Working temperature
range - 40 ° C to + 85 ° C.
features
, the input voltage range: 2.5 V - 5.5 V
Current mode, 1.2 MHz pressor converter
20V, 3.5 - built-in, Ω 0.16. N - MOSFET
- 90% efficiency
- internal digital soft start-up
- fast load transient response
- thermal protection
Adjustable output voltage, the charge pump for TFT screens provide conduction voltage
Adjustable output voltage, the charge pump for TFT screens provide off voltage
Current, high 18V VCOM buffers
- 20MHz bandwidth
Pressure pendulum 45V rate - the maximum tire-road friction coefficient/S
The output of least 500mA peak currents
, the high voltage switch circuit
- down the slope is adjustable
- decreases with the grid lines panel of the coupling effect
- flash compensation circuit
Input voltage, temperature and the latch
24 feet, 4mm 4mm x TQFN encapsulation
The RoHS, accord with standard Halogen Free and Pb - - Free
application
LCD monitor,
, laptop displays
, LCD TV