G2521 台湾致新代理商 GMT DC-DC系列 液晶显示器的集成PMIC
Integrated LCD Bias Power Supply with Level Shifter

Part Number	Vin (V)min.	Vin (V) max.	FSW (k Hz)	ILX (A)	VLX(V)	OPA S/R (V/us)	OPA ISC  (mA)	Note	Package
G2521	2.6	5.5	600/ 1200	3.0	20	20	200	Async-Boost, VGH Regulator, OPA*3, Buck-Boost VGL with Temp. Comp., 7-CH -33V ~ +33V Level-Shifter	TQFN6X6-48

 

General Description
The G2521 includes a high-performance boost regulator, a  buck-boost  controller,  a  high  voltage  charge  pump  regulator, 3 VCOM buffers (unity-gain OPA), open-drain pull  high  VGLC  signal  generator  and  7-channel  level  shifter  with  adjustable  gate  shading  function  for  ac-tive-matrix  thin-film  transistor  (TFT)  liquid-crystal  dis-plays (LCDs).

The  boost  regulator  provides  the  regulated  supply  voltage  for  the  panel  source  driver  ICs.  It  is  a  high  switching  frequency  (1.2MHz)  current-mode  regulator  with  an  integrated  20V/0.1Ω  NMOS  switch  that  al-lows  the  use  of  ultra  small  inductors  and  ceramic  ca-pacitors.  It  provides  fast  transient  response  to  pulsed  loading  while  achieving  efficiency  over  85%.  The  de-vice  can  produce  output  voltage  as  high  as  18V  from  an input as low as 2.8V.

A voltage mode buck-boost controller cooperates with external   temperature   sensor   provide   compensated   gate-off  voltage  supply  to  the  level  shifters.  While  the  charge  pump  controller  regulates  the  external  charge  pump voltage source to supply for the level shifters.

The  level  shifters  transform  the  logic-level  control  sig-nals  generated  by  the  display  timing  controller  (TCON)  into  the  high-level  signals  needed  by  LCD  panel.  Each  channel of level shifter output uses low impedance tran-sistors to achieve fast rising and falling time, even when driving the capacitive loads present in LCD applications. Channel 1 to 6 supports gate voltage shading. They are organized in two groups, each with its own shading dis-charge   resistor   output.   External   R-C   timer   defines   shading period though the DTS input.

The  VCOM  buffer  can  drive  the  LCD  VCOM  voltage  that  features  high  short-circuit  current  (200mA),  fast  slew   rate   (20V/μs),   wide   bandwidth   (8MHz)   and   rail-to-rail input/output.

The  G2521  features  extensive  protection  functions  that include UVLO, OCP, UVP, OVP, SCP and OTP. It is available in a TQFN6x6-48L package.

Features
„2.6V~5.5V Supply Range „
Current Mode Boost Regulator for AVDD Š
0.1Ω/20V/3A Embedded NMOS switch
ŠFixed 1.2MHz Switching Frequency
ŠUp to 85% Efficiency Š
1% Output Regulation „
Voltage Mode Buck-Boost Regulator for VGOFF
ŠFixed 600kHz Switching Frequency
ŠUp to 85% Efficiency Š
1% Output Regulation
„Charge Pump Regulator for VGON
„3-Channel Rail-to-Rail Unity-Gain Operational
Amplifier Š
±200mA Output Short Circuit Current Š
20V/μs Slew Rate
Š18MHz, -3dB Bandwidth „
Built-In Power On Sequence and Soft Start
Function „
7-Channel Level Shifter
Š+33V Highest Voltage Level
Š-30V Lowest Voltage Level Š
Maximum 1μs Rising/Falling Time
Š300mA Peak Current
Š15mA Continuous Current Š
Adjustable Gate Shading Function
„Opened Drain Pull High VGLC Signal „
Protections:
ŠInput Under Voltage Lockout (UVLO) Š
Over Current Protection for AVDD (OCP)
ŠOutput Under Voltage Protection for AVDD, GON and GOFF (UVP) Š
Output Over Voltage Protection for AVDD, GON and GOFF (OVP) Š
Operational Amplifier Short Circuit Protection (SCP)
ŠOver Temperature Protection (OTP) „
TQFN6x6-48L Package „
RoHS Compliant

Applications
„LCD TV Panel
„LCD Monitor Panel

Ordering Information

ORDER NUMBER	MARKING	TEMP. RANGE	PACKAGE (Green)
G2521RP1U	2521	~40°C to 85°C	TQFN6X6-48

Note:RP: TQFN6x6-48           
1:  Bonding  Code  U: Tape & Reel

台湾GMT致新代理商，欢迎咨询13244774414，还有更多精彩致新电源管理IC分享《致新DC-DC》，《DC-DC芯片》。