XC9516 Datasheet, PDF (1/26 Pages) Torex Semiconductor – Triple Output Power Supply for TFT-LCD

XC9516 Series
Triple Output Power Supply for TFT-LCD
ETR0707-009
■GENERAL DESCRIPTION
☆GreenOperation Compatible
The XC9516 series can offer three different power supplies to TFT-LCD panels. These power supplies consist of a step-up
DC/DC converter for a source driver, positive and negative charge pumps for a gate driver.
This IC has power-on sequences to keep inrush current as small when output voltage rises. The step-up DC/DC output can
be used as power-on sequences with adding a P-channel FET as external component. Also, the FET can shut down a path
to the power input line when CE pin is low.
■APPLICATIONS
●TFT-LCD panels
●LCD monitors
■FEATURES
A Step-up DC/DC Converter and 2 of Charge Pumps (Positive/Negative)
Input Voltage Range
： 2.5V ～ 5.5V
Maximum Output Voltage
： 19V (DC/DC output)
Output Voltage Accuracy
： ±1.5％
Oscillation Frequency
： 300kHz ～ 1.2MHz (Adjustable)
External MOSFET Gate Signal Output ： N-Channel Open Drain
Switch Over-Current Protection ： 1.3A
Soft-Start Time
： Internally fixed
Protection
： Over Voltage Protection (Step-up DC/DC 21V)
Short-Circuit Protection (Step-up DC/DC)
Short-Circuit Protection (Positive and Negative Charge Pump)
Thermal Shutdown (150℃)
UVLO (1.87V)
Operating Ambient Temperature ： -40℃～+85℃
Package
： QFN-20
Environmentally Friendly
： EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUITS ^{■TYPICAL PERFORMANCE}
VIN
CIN
CDD
CE
CVL
CD
VOUT
R3
R4 D2 C1
VGL
CLcp1
D3
L1
VIN
CE
CVL
CD
VOUT
FB1
DRV1
AGND
D1（SD）
VOUT ^{CHARACTERISTICS}
LX
CFB
FB
PGND
CL1
R1
R2
ROSC
ROSC
（R9）
C5（R7）
●Efficiency vs. Output Current
XC9516 Efficiency
100
90
V_IN=5.5V
VIN=VCE, VOUT=9.0V
FOSC=1MHz
Icp1=-1mA, Icp2=1mA
80
R8
SWB
CL2
Tr1
70
R10
CP2SWB
Tr2 _VSRC
60
50
C2
D4
DRV2
40
D5
VGH
30
R5 _CLcp2
FB2
20
R6
10
V_IN=2.5V
V_IN=2.5V _{VIN=3V.3INV=3.3V}
V_IN=4.0V ^VIN^=4.0V
V_IN=5.5V
2.5V
3.3V
4.0V
5.5V
e.g) Components List
0
1
V_OUT = 9.2V, V_GL = -5.3V, V_GH= 12V R1 = 820 kΩ
C_IN = 4.7μF
R₂ = 100 kΩ
C_L1,C_L2 =4.7μF
R₃ = 390 kΩ
C₁, C₂ = 0.01μF
R₄ = 300 kΩ
C_VL,C_D = 0.1μF
R₅ = 820 kΩ
C_DD = 1μF
R₆ = 75 kΩ
C_Lcp1,C_Lcp2 = 1μF
R₈ = 300 kΩ
C_FB = 22pF
R_OSC（R9）= 130 kΩ
C₅ = 0.01μF
R₁₀ = 51 kΩ
10
100
Iout[mA]
1000
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