EL7520ILZ-T13 Intersil, EL7520ILZ-T13 Datasheet

IC CTRLR DC/DC 4-CHAN 20-QFN

EL7520ILZ-T13

Manufacturer Part Number
EL7520ILZ-T13
Description
IC CTRLR DC/DC 4-CHAN 20-QFN
Manufacturer
Intersil
Type
Step-Up (Boost)r
Datasheet

Specifications of EL7520ILZ-T13

Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
4
Current - Output
40mA
Frequency - Switching
1MHz
Voltage - Input
3 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Power - Output
-
4-Channel DC/DC Controller
EL7520 and EL7520A are 4-channel DC/DC controllers that
provide a complete power supply system for TFT-LCD
applications. They consist of a 1MHz PWM boost controller,
which generates the main voltage for the column driver, and
three LDO controllers for V
They also include integrated start-up sequence and start-up
delay control.
EL7520 and EL7520A operate from 3V to 5.5V. The boost
controller can drive a wide range of output current
depending on the external FET. It can be programmed to
operate in either P-mode for fast transient response or PI-
mode for improved load regulation. The EL7520 and
EL7520A also integrate fault protection for all four output
channels. When a fault is detected, the device is latched off
until either the input supply voltage or enable is cycled.
Therefore, they are ideal to use in any size of TFT-LCD
panels.
The EL7520 and EL7520A are available in a 20 Ld 4x4 QFN
package with maximum height of 0.9mm and is specified for
operation of 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.
EL7520ILZ
EL7520ILZ-T7
EL7520ILZ-T13
EL7520AILZ
EL7520AILZ-T7
EL7520AILZ-T13
PART NUMBER
(NOTE)
20 Ld 4x4 QFN
20 Ld 4x4 QFN
20 Ld 4x4 QFN
20 Ld 4x4 QFN
20 Ld 4x4 QFN
20 Ld 4x4 QFN
PACKAGE
(Pb-FREE)
ON
®
, V
1
OFF
Data Sheet
, and V
TAPE &
REEL
13”
13”
7”
7”
-
-
LOGIC
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
MDP0046
DWG. #
supplies.
PKG.
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Complete TFT-LCD supply controller
• Integrated start-up sequence for V
• Programmable sequence delay
• In-rush current control
• Fully fault protected
• Thermal shutdown
• Internal soft-start
• 3V to 5.5V V
• 20 Ld 4x4 QFN package
• Low cost
• Pb-Free plus anneal available (RoHS compliant)
Applications
• LCD monitors (15”+)
• LCD-TV (up to 40”+)
• Notebook displays (up to 16”)
• Industrial/medical LCD displays
Pinout
- 1MHz PWM boost controller
- V
- V
- Logic supply LDO controller
V
- V
ON
ON
OFF
LOGIC
or V
All other trademarks mentioned are the property of their respective owners.
July 12, 2005
LDO controller
LDO controller
|
PGND
DRVB
CDLY
LOGIC
ISAD
Intersil (and design) is a registered trademark of Intersil Americas Inc.
ISIN
permanently enabled in 'A version (EL7520A)
DD
1
2
3
4
5
, V
EL7520 AND EL7520A
Copyright Intersil Americas Inc. 2005. All Rights Reserved
OFF
(20 LD 4X4 QFN)
, V
EL7520, EL7520A
TOP VIEW
THERMAL
BOOST
PAD
, V
LOGIC
ON
15
14
13
12
11 FBN
/V
FBP
DRVL
FBL
DRVN
BOOST
FN7318.0
, V
OFF,

Related parts for EL7520ILZ-T13

EL7520ILZ-T13 Summary of contents

Page 1

... PART NUMBER PACKAGE TAPE & (NOTE) (Pb-FREE) EL7520ILZ 20 Ld 4x4 QFN EL7520ILZ- 4x4 QFN EL7520ILZ-T13 20 Ld 4x4 QFN EL7520AILZ 20 Ld 4x4 QFN EL7520AILZ- 4x4 QFN EL7520AILZ-T13 20 Ld 4x4 QFN 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 ...

Page 2

Absolute Maximum Ratings ( ...

Page 3

Electrical Specifications 40°C to 85°C, unless otherwise specified. (Continued) PARAMETER DESCRIPTION ∆V /∆I Load Regulation DRVP Sink Current DRVP I DRVP Leakage Current L_DRVP V LDO OFF V FBN ...

Page 4

Typical Performance Curves 100 500 I (mA) OUT FIGURE 1. V EFFICIENCY vs I BOOST 0 -0.5 -1 -1 (V) ...

Page 5

Typical Performance Curves 0 -0.2 -0.4 -0.6 -0.8 -1 -1.2 -1 (mA) OUT FIGURE 7. V LOAD REGULATION OFF V CDLY EN V LOGIC V REF TIME (20ms/DIV) FIGURE 9. EL7520 START-UP SEQUENCE V BOOST ...

Page 6

Typical Performance Curves V CDLY EN V LOGIC V REF TIME (20ms/DIV) FIGURE 13. EL7520A START-UP SEQUENCE V BOOST V LOGIC V OFF V ON TIME (20ms/DIV) FIGURE 15. EL7520A START-UP SEQUENCE 6 EL7520, EL7520A (Continued BOOST V ...

Page 7

Typical Performance Curves 0.5µs/DIV FIGURE 18. LX WAVEFORM-CONTINUOUS MODE CH1=V , 100mV/DIV BOOST CH4=LOAD CURRENT, 200mA/DIV 0.2ms/DIV FIGURE 20. V TRANSIENT RESPONSE BOOST CH1=V , 100mV/DIV ON CH4=LOAD CURRENT, 50mA/DIV 50µs/DIV FIGURE 22. V TRANSIENT RESPONSE ON 7 EL7520, EL7520A ...

Page 8

Pin Descriptions PIN NUMBER PIN NAME 1 CDLY With a capacitor connected from this pin to GND sets the delay time for start-up sequence and sets the fault timeout time 2 DRVB Gate driver output for the external N channel ...

Page 9

Typical Application NODE 1000pF 500kΩ 0.1µF 0.1µ 10Ω 4.7µ 10K V REF C 41 0.1µF 0.1µF NODE 500Ω ...

Page 10

V REFERENCE REF GENERATOR FBB GM AMPLIFIER C INT UVLO COMPARATOR EN THERMAL SHUTDOWN DRVN BUFFER FBN 0.4V COMPARATOR Boost Converter The main boost converter is a current mode PWM controller operating at a fixed frequency. The 1MHz switching frequency ...

Page 11

V REF REFERENCE GENERATOR GM AMPLIFIER UVLO COMPARATOR FIGURE 25. FUNCTION DIAGRAM OF THE BOOST CONTROLLER The internal current limit circuitry is shown in Figure 26. The circuit senses the voltage across the R MOSFET is on; then compare it ...

Page 12

Input Capacitor The input capacitor is used to supply the current to the converter recommended that C IN The reflected ripple voltage will be smaller with larger C The voltage rating of input capacitor should be larger than ...

Page 13

The minimum base-emitter resistor, R calculated as: R _min = V _max/(I_DRVL_min - Ic/Hfe_min 1.25V/(8mA - 500mA/100) = 417Ω This is the minimum value that can be used - so, we now choose a convenient value greater ...

Page 14

Typical V voltage supported by EL7520, EL7520A range from LOGIC +1. -0.2V. A fault comparator is also included for DD monitoring the output voltage. The undervoltage threshold is set ...

Page 15

EL7520, EL7520A V CDLY EN V REF V BOOST LOGIC V OFF t DEL1 DELAYED V BOOST V ON START-UP SEQUENCE TIMED BY C FIGURE 30. EL7520 START-UP SEQUENCE DEL2 DLY FN7318.0 July ...

Page 16

EL7520, EL7520A V CDLY REF V BOOST LOGIC V OFF t DEL1 DELAYED V BOOST V ON START-UP SEQUENCE TIMED BY C FIGURE 31. EL7520A START-UP SEQUENCE DEL2 t ...

Page 17

Over-Temperature Protection An internal temperature sensor continuously monitor the die temperature. In the event that the die temperature exceeds the thermal trip point, the device will shut down. The upper and lower trigger points are typically set to 130°C and ...

Page 18

... 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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