EL7640AILTZ Intersil, EL7640AILTZ Datasheet

IC CONV DC/DC TFT-LCD 32-QFN

EL7640AILTZ

Manufacturer Part Number
EL7640AILTZ
Description
IC CONV DC/DC TFT-LCD 32-QFN
Manufacturer
Intersil
Datasheet

Specifications of EL7640AILTZ

Applications
Converter, TFT, LCD
Voltage - Input
2.6 ~ 5.5 V
Number Of Outputs
3
Voltage - Output
5.5 ~ 20 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-WQFN, 32-miniQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
TFT-LCD DC/DC with Integrated
Amplifiers
The EL7640A, EL7641A, and EL7642A integrate a high
performance boost regulator with 2 LDO controllers for V
and V
either one (EL7640A), three (EL7641A), or five amplifiers
(EL7642A) for V
The boost converter in the EL7640A, EL7641A, and
EL7642A is a current mode PWM type integrating an 18V
NHchannel MOSFET. Operating at 1.2MHz, this boost can
operate in either P-mode for superior transient response, or
in PI-mode for tighter output regulation.
Using external low-cost transistors, the LDO controllers
provide tight regulation for V
start-up sequence control and fault protection.
The amplifiers are ideal for V
applications, with 150mA peak output current drive, 12MHz
bandwidth, and 12V/µs slew rate. All inputs and outputs are
rail-to-rail.
Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free
packages, the EL7640A, EL7641A, and EL7642A are specified
for operation over the -40°C to +85°C temperature range.
Ordering Information
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb
and Pb-free soldering operations. Intersil Pb-free products are MSL classified at
Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements
of IPC/JEDEC J STD-020.
EL7640AILTZ
EL7640AILTZ-T7
EL7640AILTZ-T13 7640AILTZ
EL7641AILTZ
EL7641AILTZ-T7
EL7641AILTZ-T13 7641AILTZ
EL7642AILTZ
EL7642AILTZ-T7
EL7642AILTZ-T13 7642AILTZ
PART NUMBER
OFF
(Note)
PRELIMINARY
, a V
ON
COM
-slice circuit with adjustable delay and
7640AILTZ
7640AILTZ
7641AILTZ
7641AILTZ
7642AILTZ
7642AILTZ
MARKING
PART
and V
®
GAMMA
ON
COM
1
TAPE &
REEL
, V
13”
13”
13”
7”
7”
7”
-
-
-
OFF
and V
applications.
Data Sheet
, as well as providing
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
32 Ld 5x5
Thin QFN
PACKAGE
(Pb-Free)
GAMMA
MDP0051
MDP0051
MDP0051
MDP0051
MDP0051
MDP0051
MDP0051
MDP0051
MDP0051
DWG. #
PKG.
1-888-INTERSIL or 1-888-468-3774
ON
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Current mode boost regulator
• 2.6V to 5.5V V
• 2 LDO controllers for V
• High speed amplifiers
• Built-in power sequencing
• Internal soft-start
• Multiple overload protection
• Thermal shutdown
• 32 Ld 5x5 thin QFN package
• Pb-free plus anneal available (RoHS compliant)
Applications
• TFT-LCD panels
• LCD monitors
• Notebooks
• LCD-TVs
- Fast transient response
- 1% accurate output voltage
- 18V/3A integrated FET
- >90% efficiency
- 2% output regulation
- V
- 150mA short-circuit output current
- 12V/µs slew rate
- 12MHz -3dB bandwidth
- Rail-to-rail inputs and outputs
EL7640A, EL7641A, EL7642A
ON
All other trademarks mentioned are the property of their respective owners.
-slice circuit
May 15, 2006
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
IN
supply
Copyright Intersil Americas Inc. 2006. All Rights Reserved
ON
and V
OFF
FN6270.0

Related parts for EL7640AILTZ

EL7640AILTZ Summary of contents

Page 1

... PART NUMBER PART TAPE & (Note) MARKING REEL EL7640AILTZ 7640AILTZ - 32 Ld 5x5 Thin QFN EL7640AILTZ-T7 7640AILTZ 7” 5x5 Thin QFN EL7640AILTZ-T13 7640AILTZ 13” 5x5 Thin QFN EL7641AILTZ 7641AILTZ - 32 Ld 5x5 Thin QFN EL7641AILTZ-T7 7641AILTZ 7” 5x5 Thin QFN EL7641AILTZ-T13 7641AILTZ 13” ...

Page 2

Pinouts EL7640A (32 LD QFN) TOP VIEW SRC 1 REF 2 AGND 3 PGND 4 THERMAL PAD OUT1 5 NEG1 6 POS1 NOT INTERNALLY CONNECTED IC = INTERNALLY CONNECTED EL7642A (32 LD QFN) TOP VIEW ...

Page 3

Absolute Maximum Ratings (T A IN, CTL to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V ...

Page 4

Electrical Specifications Unless Otherwise Specified. (Continued) PARAMETER DESCRIPTION OPERATIONAL AMPLIFIERS V Supply Operating Range SUP I Supply Current per Amplifier SUP V Offset Voltage OS I Input Bias Current B CMIR Common Mode Input Range ...

Page 5

Electrical Specifications Unless Otherwise Specified. (Continued) PARAMETER DESCRIPTION V -SLICE CIRCUIT ON V CTL Input Low Voltage LO V CTL Input High Voltage HI I CTL CTL Input Leakage Current LEAK t rise CTL to ...

Page 6

Pin Descriptions PIN NAME EL7642A EL7641A SRC 1 REF 2 AGND 3 PGND 4 OUT1 5 NEG1 6 POS1 7 OUT2 8 NEG2 9 POS2 10 BGND 11 POS3 12 NEG3 - OUT3 13 SUP 14 POS4 15 NEG4 16 ...

Page 7

Typical Performance Curves 100 = = 200 400 600 800 LOAD CURRENT (mA) FIGURE 1. BOOST EFFICIENCY -0.1 V =3V IN -0.2 ...

Page 8

Typical Performance Curves BOOST OUTPUT VOLTAGE (AC COUPLING) BOOST OUTPUT CURRENT FIGURE 7. BOOST PULSE LOAD TRANSIENT RESPONSE 0 -0.02 -0.04 -0.06 -0.08 -0.1 -0. INPUT VOLTAGE (V) FIGURE 9. V LINE REGULATION ON 0 -0.1 ...

Page 9

Typical Performance Curves INPUT VOLTAGE TIME (20ms/DIV) FIGURE 13. START-UP SEQUENCE JEDEC JESD51-3 AND SEMI G42-88 (SINGLE LAYER) TEST BOARD 0.8 0.7 758mW QFN32 0.6 θ =125°C/W JA 0.5 0.4 0.3 0.2 0 100 ...

Page 10

V REF REFERENCE GENERATOR FBB GM AMPLIFIER C INT UVLO COMPARATOR THERMAL SHUTDOWN DRVN BUFFER FBN 0.4V Boost Converter The main boost converter is a current mode PWM converter operating at a fixed frequency. The 1.2MHz switching frequency enables the ...

Page 11

The current through MOSFET is limited to 3A peak. This restricts the maximum output current based on the following equation: ∆I V ⎛ ⎞ × --------- = – -------- ⎝ ⎠ OMAX LMT ...

Page 12

The following table gives typical values (margins are considered 10%, 3%, 20%, 10% and 15 and I : LMT TABLE 2. V (V) V (V) L (µ 3.3 9 6.8 3.3 12 6.8 3.3 ...

Page 13

LDO_ON 0.9V PG_LDOP + 36V ESD - CLAMP R BP 700Ω DRVP FBP + - GMP 1: Np FIGURE 19. V FUNCTIONAL BLOCK DIAGRAM ON LDO_OFF PG_LDON - + R 0.4V 20kΩ FBN DRVN + GMN ...

Page 14

EL7642A FIGURE 22. THE LINEAR REGULATOR CONTROLS ONE STAGE OF CHARGE PUMP Calculation of the Linear Regulator Base-emitter Resistors (RBP and RBN) For the pass transistor of the linear regulator, low frequency gain (Hfe) and unity gain frequency (f T ...

Page 15

V supplies. It can be appreciated that should a regular OFF supply of LX switching edges be interrupted, for example during discontinuous operation at light boost load currents, then this may affect the performance of V regulation – depending on ...

Page 16

V CDEL IN V REF V BOOST V OFF CIRCUIT ON SLICE NOTE: Not to scale Component Selection for Start-up Sequencing and Fault Protection The C capacitor is typically set at 220nF and is required REF to ...

Page 17

A high quality layout/design of the PCB, in respect of grounding quality and decoupling is necessary to avoid falsely triggering the fault detection scheme – especially during start-up. The user is directed to the layout guidelines and component selection ...

Page 18

A signal ground plane, separate from the power ground plane and connected to the power ground pins only at the exposed die plate, should be used for ground return connections for feedback resistor networks (R1, R11, R41) and the ...

Page 19

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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