MAX8795AETJ+ Maxim Integrated Products, MAX8795AETJ+ Datasheet - Page 15

• Manufacturer Part Number: MAX8795AETJ+
• Description: IC DC-DC CONV W/OP AMP 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8795AETJ+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.5 ~ 6 V
• Number Of Outputs: 8
• Voltage - Output: 2.5 ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX8795A typical operating circuit (Figure 1) is a
complete power-supply system for TFT LCDs. The circuit
generates a +14V source-driver supply and +25V and
Figure 1. Typical Operating Circuit
Table 1. Component List
DESIGNATION
D2, D3
C1
C2
D1
4.5V TO 5.5V
LX
V
IN
-10V/50mA
0.1μF
C11
Typical Operating Circuit
V
GOFF
22μF, 6.3V X5R ceramic capacitor (1210)
TDK C3225X5R0J227M
22μF, 16V X5R ceramic capacitor (1812)
TDK C4532X5X1C226M
3A, 30V Schottky diode (M-flat)
Toshiba CMS02
200mA, 100V, dual ultra-fast diodes (SOT23)
Fairchild MMBD4148SE
D3
______________________________________________________________________________________
BACKPLANE
TO VCOM
220μF
0.22μF
22μF
C10
0.1μF
C12
C1
C9
Q2
DESCRIPTION
180kΩ
324kΩ
6.8kΩ
1%
R7
R9
0.033μF
0.22μF
31.6kΩ
0.1μF
C13
10Ω
R10
C8
C7
1%
R8
TFT-LCD DC-DC Converter with
REF
IN
COMP
DRVN
FBN
DEL
NEG1
OUT1
NEG2
OUT2
OUT3
NEG4
OUT4
NEG5
OUT5
3.0μH
L1
MAX8795A
EP
LX
AGND
PGND
BGND
DRVP
POS1
POS2
POS3
POS4
POS5
COM
SRC
DRN
SUP
FBP
CTL
FB
LX
D1
10.0kΩ
13.3kΩ
137kΩ
-10V gate-driver supplies. The input voltage range for the
IC is from +2.5V to +5.5V. The listed load currents in
Figure 1 are available from a +4.5V to +5.5V supply.
Table 1 lists some recommended components, and Table
2 lists the contact information of component suppliers.
Operational Amplifiers
DESIGNATION
1%
1%
1%
R1
R2
R5
C6
0.1μF
R19
100kΩ
R20
100kΩ
Q1
Q2
L1
68pF
6.8kΩ
0.1μF
C14
191kΩ
R3
1%
R4
C4
LX
R17
100kΩ
R18
100kΩ
1kΩ
Q1
R6
0.1μF
3.0μH, 3A inductor
Sumida CDRH6D28-3R0
200mA, 40V pnp bipolar transistor (SOT23)
Fairchild MMBT3906
200mA, 40V npn bipolar transistor (SOT23)
Fairchild MMBT3904
C5
0.47μF
C3
V
25V/20mA
GON
D2
R15
100kΩ
R16
100kΩ
C2
22μF
R13
100kΩ
R14
100kΩ
DESCRIPTION
R11
100kΩ
R12
100kΩ
V
14V/500mA
MAIN
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