ZXLD1100H6TA Diodes Zetex, ZXLD1100H6TA Datasheet

IC LED DRVR WHITE BCKLGT SC-70-6

ZXLD1100H6TA

Manufacturer Part Number
ZXLD1100H6TA
Description
IC LED DRVR WHITE BCKLGT SC-70-6
Manufacturer
Diodes Zetex
Type
Backlight, White LEDr
Datasheet

Specifications of ZXLD1100H6TA

Topology
PWM, Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
1MHz
Voltage - Supply
2.5 V ~ 5.5 V
Voltage - Output
28V
Mounting Type
Surface Mount
Package / Case
SC-70-6, SC-88, SOT-363
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
50mA
Internal Switch(s)
Yes
Efficiency
80%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
UZXLD1100H6TA
UZXLD1100H6TR
UZXLD1100H6TR
ZXLD1100H6TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ZXLD1100H6TA
Manufacturer:
ZETEX
Quantity:
20 000
ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH AND OPEN
CIRCUIT PROTECTION IN SC70-6
DESCRIPTION
The ZXLD1100 is a PFM inductive boost converter
designed for driving 2, 3 or 4 series connected white
LEDs from a Li-Ion cell and up to 8 LEDs from a 5V
supply. The device operates from an input supply of
between 2.5V and 5.5V and provides an adjustable
output current of up to 50mA.
The ZXLD1100 includes the output switch and peak
current sense resistor, and can operate with a
maximum output voltage of 28V.
Quiescent current is typically 60 A and a shutdown
function is provided to reduce this current to less than
500nA in the 'off' state.
ADVANCED FEATURES
FEATURES
ISSUE 4 - JULY 2004
Internal 30V NDMOS switch, current sense and
open circuit protection
True Analog Dimming via PWM
Low profile SC70 6 pin package
Internal PWM filter for flicker free output
High efficiency (80% typ)
Wide input voltage range: 2.5V to 5.5V
Up to 50mA output current
Low quiescent current: (60 A typ)
500nA maximum shutdown current
Up to 1MHz switching frequency
Low external component count
Inherently matched LED currents
PIN CONNECTIONS
1
Output current can be adjusted by applying a PWM
control signal to the 'Enable' pin. Depending upon the
control frequency, this will provide either a continuous
or a 'chopped' output current. The PWM filter
components are contained within the chip.
The ZXLD1100 contains an internal avalanche diode to
protect the output switch. This allows the device to
operate indefinitely if the load is open circuit. Input
supply current during this condition is less than 1mA.
The device is assembled in a low profile SC70-6 pin
package with industry standard pinout.
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
Mobile phones
Digital cameras
PDAs
LCD modules
Portable internet appliances
Palmtop computers
ZXLD1100
S E M I C O N D U C T O R S

Related parts for ZXLD1100H6TA

ZXLD1100H6TA Summary of contents

Page 1

ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH AND OPEN CIRCUIT PROTECTION IN SC70-6 DESCRIPTION The ZXLD1100 is a PFM inductive boost converter designed for driving series connected white LEDs from a Li-Ion cell and ...

Page 2

... ZXLD1100 ORDERING INFORMATION DEVICE DEVICE DESCRIPTION ZXLD1100H6 Boost convertor in SC70-6 ZXLD1100H6TA = 7” reel of 3,000 devices ZXLD1100H6TC = 13” reel of 10,000 devices ABSOLUTE MAXIMUM RATINGS (Voltages to GND unless otherwise stated) PARAMETER Input voltage LX output voltage Switch output current Power dissipation Operating temperature Storage temperature ...

Page 3

ELECTRICAL CHARACTERISTICS (at V SYMBOL PARAMETER V Input voltage IN I Supply current IN Quiescent Shutdown V FB pin control voltage pin input current FB f Operating frequency output 'OFF' time OFF (2) T ...

Page 4

ZXLD1100 PIN DESCRIPTION PIN NO. NAME DESCRIPTION 1 LX Output of NDMOS switch 2 GND Ground (0V Feedback pin for current control loop (connect resistor R1 from this pin to GND for output current I=100mV/ R1 ...

Page 5

DEVICE DESCRIPTION The device is a PFM flyback dc-dc boost converter, working in discontinuous mode. With reference to the chip block diagram and typical application circuit, the operation of the device is as follows: Control loop When 'EN' is high, ...

Page 6

ZXLD1100 TYPICAL CHARACTERISTICS (For typical application circuit =3V and TA=25 °C unless otherwise stated ISSUE 4 - JULY 2004 ...

Page 7

TYPICAL OPERATING CHARACTERISTICS (For typical applications circuit =15mA, T =25 °C unless otherwise stated) LED A ISSUE 4 - JULY 2004 =3V, L=10 H Coilcraft DO1608C Series, 3 series LEDs ZXLD1100 ...

Page 8

ZXLD1100 APPLICATIONS Programming the maximum LED current The maximum LED current is programmed by adding a single resistor in series with the LED chain. The current is determined by the resistor value and feedback voltage and is given by: I ...

Page 9

Open circuit protection The voltage sense pin (V ) can be connected to the SENSE output to provide open circuit protection for the device and external circuits when driving series connected LEDs, thus eliminating the need for an external Zener ...

Page 10

ZXLD1100 Inductor selection The choice of inductor will depend on available board space as well as required performance. Small value inductors have the advantage of smaller physical size and may offer lower series resistance and higher saturation current compared to ...

Page 11

REFERENCE DESIGNS 3 LED Driver for Handset LCD Backlight Circuit Diagram Bill of materials Ref Value Package U1 SC70-6 D1 400mA SOD323 6.8 0603 1 R2 100k 0603 0603 0603 ...

Page 12

ZXLD1100 4 LED Driver for Handset LCD Backlight Circuit Diagram Bill of materials Ref Value Package U1 SC70-6 D1 400mA SOD323 6.8 0603 1 R2 100k 0603 0603 0603 LEDs ...

Page 13

LED Driver for Handset Main and Sub Display LCD Backlight Circuit Diagram Bill of materials Ref Value Package U1 SC70-6 D1 400mA SOD323 6.8 0603 1 R2 100k 0603 0603 C2 1 ...

Page 14

ZXLD1100 6 LED Driver for LCD Backlight Circuit Diagram Bill of materials Ref Value Package U1 SC70-6 D1 400mA SOD323 6.8 0603 1 R2 100k 0603 0603 0603 LEDs Note: ...

Page 15

ISSUE 4 - JULY 2004 ZXLD1100 ...

Page 16

ZXLD1100 PACKAGE OUTLINE - SC70-6 Controlling dimensions are in millimeters. Approximate conversions are given in inches PACKAGE DIMENSIONS Millimeters Inches DIM Min Max Min Max A 0.80 1.10 0.0315 0.0433 A1 - 0.10 - 0.0039 A2 0.80 1.00 0.0315 0.0394 ...

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