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ZLED7022ZI1R

Description
VFQFPN-12, Reel
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size434KB,15 Pages
ManufacturerIDT (Integrated Device Technology)
Environmental Compliance  
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ZLED7022ZI1R Overview

VFQFPN-12, Reel

ZLED7022ZI1R Parametric

Parameter NameAttribute value
Brand NameIntegrated Device Technology
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerIDT (Integrated Device Technology)
Parts packaging codeVFQFPN
package instruction,
Contacts12
Manufacturer packaging codeNEG12
Reach Compliance Codecompliant
JESD-609 codee3
Humidity sensitivity level3
Peak Reflow Temperature (Celsius)260
Terminal surfaceTin (Sn)
Maximum time at peak reflow temperatureNOT SPECIFIED

ZLED7022ZI1R Preview

Low-Voltage Six-Channel
LED Driver
Brief Description
The ZLED7022, one of our ZLED family of LED control
ICs, is a low-noise, constant-frequency charge pump
DC/DC converter that can drive up to six LED channels,
providing a programmable constant current level ranging
from 1.8mA to 20mA per LED channel. It can also drive
higher current LEDs because its current sinks can
operate in parallel. It enables white or other color LED
applications that require uniform intensity and/or linear
progressions in brightness. Capable of operating effi-
ciently with DC voltage supplies ranging from 2.8V to
5.5V, it is ideal for small, battery-powered applications
because very few external components are needed:
typically one small-dimension 1μF capacitor across the
C+ and C- pins and two small-dimension 2.2μF capaci-
tors to GND from the VCC and Vout pins.
The ZLED7022’s Pulse Count Control (PCC) serial digi-
tal input is used to enable/disable the LEDs and set the
current level (14 settings using a nearly logarithmic
scale to provide a linear brightness progression). This
simple, high-speed interface allows efficient real-time
management of LEDs via microcontrollers or control
systems.
The ZLED7022’s features include integrated soft-start
circuitry to protect against excessive in-rush current dur-
ing power-on and a low-current shutdown mode that
reduces quiescent current consumption to approximately
1μA (typical) by disconnecting the load from the input
when the EN/SET pin is low for a specified time.
ZLED7022
Datasheet
Benefits
Current matching accuracy: ±0.9% (typical)
One-pin on/off or brightness control for up to six
LEDs via a simple PCC serial interface—no pulse-
width modulation or additional control circuit needed
14 programmable current levels for achieving real-
time control of effects such as LED fade-out or
sudden changes in brightness
Low EMI and back-injected noise because the
charge pump is not inductor-based
Very few external components needed for operation
Flexible design enables diverse LED applications: up
to 20mA per channel
LED driver family concept with low-voltage
four-channel LED driver ZLED7012
Available Support
Evaluation Kit
Physical Characteristics
Voltage supply: 2.8V to 5.5V DC
Operating temperature: -40°C to 85°C
Small footprint 12-pin UTQFN package (2mm×2mm)
Features
Low quiescent current in low-current shutdown
mode: 1μA typical; <2μA maximum
Integrated thermal shutdown protection prevents
damage by shutting down the ZLED7022 if the die
junction temperature exceeds 160°C (typical)
Fixed charge pump switching frequency: 1MHz (typ.)
Soft-start feature protects against excessive
inrush current during power-on
1μF
Cpump
C+
.
2.8V to 5.5V
Cin
2.2μF
VCC
C-
Vout
Cout
2.2μF
ZLED7022 Application Circuit
ZLED7022
GND
D0
D1
EN/SET
D2
D3
D4
D5
1
2
n<=14
© 2016 Integrated Device Technology, Inc.
1
April 20, 2016
Low-Voltage Six-Channel
LED Driver
Block Diagram
1µF
C
+
S1
ZLED7022
Datasheet
Cpump
C
-
S4
EN_CP
S2
Vref
Vout
VCC
S3
Charge Pump
Vcon
ZLED7022
S<1:14>
+
A
M1
D0
Iref <1:14>
-
Cout
2.2μF
Iout
R1
D0 Driver
R2
D1
D2
<D1:D5> Drivers
D3
D4
D5
EN/SET
Data Processor
SD
GND
Typical Applications
LED backlighting for portable devices
LED lighting for cell phones, smartphones. PDAs
Illumination of digital photo frames
Backlighting for GPS / navigation systems
Low voltage LED lighting fixtures
General purpose low-voltage industrial and consumer applications
Ordering Information
Product Sales Code
ZLED7022ZI1R
ZLED7022KIT-E1
Description
ZLED7022 – Low-Voltage Six-Channel LED Driver
ZLED7022 Evaluation Board
Kit
Package
UTQFN12 (2x2)mm - Tape & Reel
© 2016 Integrated Device Technology, Inc.
2
April 20, 2016
ZLED7022 Datasheet
Contents
1
IC Characteristics .......................................................................................................................................................... 5
1.1.
1.2.
1.3.
1.4.
2
2.1.
2.2.
2.3.
2.4.
2.5.
2.6.
3
3.1.
3.2.
4
4.1.
4.2.
Absolute Maximum Ratings ................................................................................................................................... 5
Operating Conditions ............................................................................................................................................. 5
Electrical Parameters ............................................................................................................................................. 5
Typical Performance Graphs ................................................................................................................................. 6
Block diagram ........................................................................................................................................................ 8
ZLED7022 Overview .............................................................................................................................................. 8
ZLED7022 Soft-Start Feature ................................................................................................................................ 9
ZLED7022 Low-Current Shutdown Mode .............................................................................................................. 9
LED Current Control .............................................................................................................................................. 9
PCC Serial Digital Interface ................................................................................................................................. 10
RF Noise Reduction ............................................................................................................................................. 10
ZLED7022 Thermal Protection............................................................................................................................. 10
Applications.......................................................................................................................................................... 11
External Components .......................................................................................................................................... 11
External Capacitors Cout and Cin................................................................................................................. 11
External Pump Capacitor .............................................................................................................................. 11
LEDs ............................................................................................................................................................. 12
Circuit Description ......................................................................................................................................................... 8
Operating Conditions ................................................................................................................................................... 10
Application Circuit Design............................................................................................................................................ 11
4.2.1.
4.2.2.
4.2.3.
4.3.
5
6
7
8
9
Unused LED Driver Pins ...................................................................................................................................... 12
ESD Protection ............................................................................................................................................................ 12
Pin Configuration and Package ................................................................................................................................... 12
Ordering Information ................................................................................................................................................... 14
Glossary ...................................................................................................................................................................... 14
Document Revision History ......................................................................................................................................... 14
© 2016 Integrated Device Technology, Inc.
3
April 20, 2016
ZLED7022 Datasheet
List of Figures
Figure 1.1
Figure 1.2
Figure 1.3
Figure 1.4
Figure 1.5
Figure 2.1
Figure 4.1
Figure 6.1
Figure 6.2
Operating Current I
CC
over Supply Voltage V
CC
Range (2.8V to 5.5V) at 25°C .............................................. 6
LED Current over Supply Voltage V
CC
Range (2.8V to 5.5V) for Outputs D0:D5 (LED0:LED5) ..................... 7
Shutdown Current I
SD
over Supply Voltage V
CC
Range (2.8V to 5.5V) ........................................................... 7
Current I
CC
over Temperature Range (-40°C to +85°C) .................................................................................. 7
Efficiency (%) over the V
CC
Range (2.8V to 5.5V) at 25°C ............................................................................. 8
PCC Serial Digital Interface Signal Timing ................................................................................................... 10
Basic Application Circuit using D4:D0 .......................................................................................................... 11
Pin Configuration ZLED7022 – Top View ..................................................................................................... 12
UTQFN-12 Package Drawing ....................................................................................................................... 13
List of Tables
Table 2.1
Table 6.1
Table 6.2
Current Output Settings .................................................................................................................................. 9
Layout Requirements and Pin Descriptions - 12-pin UTQFN Package ........................................................ 13
UTQFN-12 Package Dimensions ................................................................................................................. 13
© 2016 Integrated Device Technology, Inc.
4
April 20, 2016
ZLED7022 Datasheet
1
1.1.
IC Characteristics
Absolute Maximum Ratings
PARAMETER
Input voltage referenced to
ground
EN/SET voltage referenced
to ground
Maximum soldering
temperature
Maximum Thermal
Resistance
Junction temperature
SYMBOL
V
CC
V
EN/SET
T
LEAD
θ
JA
T
J
At ZLED7022 lead;
10 seconds maximum
UTQFN-12 package
-40
CONDITIONS
MIN
-0.3
-0.3
TYP
MAX
6.0
V
CC
+0.3
300
60
150
UNIT
V
V
°C
°C/W
°C
No.
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.2.
No.
1.2.1
1.2.2
Operating Conditions
PARAMETER
Operating temperature
Input voltage
SYMBOL
T
amb
V
CC
CONDITIONS
MIN
-40
2.8
TYP
MAX
+85
5.5
UNIT
°C
V
1.3.
Electrical Parameters
Except as noted, conditions for the following specifications are T
amb
= -40°C to +85°C (25°C typical);
V
CC
= 2.8V to 5.5V; Cin = Cout = 2.2μF; Cpump = 1µF
Production testing is at 25°C. At other temperatures within the specified operating range, functional operation of the ZLED7022
and specified parameters are guaranteed by characterization, design, and process control.
Parameters marked with an asterisk (*) are guaranteed by design.
No.
PARAMETER
SYMBOL
CONDITIONS
Input Power Supply
1.3.1
1.3.2
1.3.3
Operating current
Current consumption in
shutdown mode
Current matching between
channels
I
CC
I
SHDN
I
D-Match
2.8 ≤ V
CC
≤ 5.5;
I
SET
= 20mA; No Load
V
EN/SET
= 0V
I
SET
= 20mA
Charge Pump
1.3.4
1.3.5
Charge pump frequency
*
Soft-start time
*
f
CP
T
SS
1.0
33.0
MHz
μs
0.6
1.0
±0.9
1.0
2.0
mA
μA
%
MIN
TYP
MAX
UNIT
© 2016 Integrated Device Technology, Inc.
5
April 20, 2016
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