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PDF CAT4004B Data sheet ( Hoja de datos )
| Número de pieza | CAT4004B | |
| Descripción | Constant Current Programmable LED Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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CAT4003B, CAT4004B
Constant Current
Programmable LED Driver
with 32 Dimming Levels
Description
The CAT4003B and CAT4004B provide respectively three and four
matched low dropout current sources to drive LEDs. The CAT400XB
requires no external RSET resistor. The LED current is internally set
to 25 mA when the device is first enabled. Each LED channel includes
an individual control loop allowing the device to handle a wide range
of LED forward voltages while still maintaining tight current
matching.
The EN/DIM logic input supports the device enable and a digital
dimming interface for setting the LED channel current with 32 linear
dimming levels.
LEDs can be powered directly from a Lithium−ion battery due to the
low dropout (75 mV at 20 mA) current sinks.
Package options are available in the 4−channel tiny 8−pad UDFN
2 mm x 2 mm with a max height of 0.55 mm, and 3− channel in the
6−lead TSOT−23, TSOP and SC−70.
Features
• 3, 4 LED Current Sinks with Tight Matching
• 32 Dimming Levels
• Low Dropout Driver 75 mV at 20 mA
• No Switching Noise
• Shutdown Current less than 1 mA
• 25 mA Max LED Current per Channel
• Dimming via 1−wire EZDim Interface
• Thermal Shutdown Protection
• RoHS Compliant
• 6−lead TSOT−23, TSOP, SC−70, and 8−pad UDFN 2 mm x 2 mm
Packages
Typical Applications
• LCD Display Backlight
• Cellular Phones
• Digital Still Cameras
This document contains information on some products that are still under development.
ON Semiconductor reserves the right to change or discontinue these products without
notice.
http://onsemi.com
UDFN−8
HU2 SUFFIX
CASE 517AW
TSOT23−6
TD SUFFIX
CASE 419AF
SC70−6
SD SUFFIX
CASE 419AD
TSOP−6
TS SUFFIX
CASE 318G
TYPICAL APPLICATION CIRCUIT
VIN
2.4 V CIN
to
5.5 V 1 mF
LED1 LED2 LED3
VIN
One Wire
Programming
32 Steps
CAT4003B
EN/DIM
GND
ORDERING INFORMATION
See detailed ordering information on page 2 of this data
sheet.
© Semiconductor Components Industries, LLC, 2011
January, 2012 − Rev. 2
1
Publication Order Number:
CAT4003B/D
1 page  
CAT4003B, CAT4004B
TYPICAL CHARACTERISTICS
(CAT4003B, VIN = 4 V, VF = 3.3 V, IOUT = 75 mA (3 LEDs at 25 mA), CIN = 1 μF, TAMB = 25°C unless otherwise specified.)
1.4
−40°C
1.4
1.2
25°C
1.2
1.0
1.0
0.8
0.6
80°C
0.4
2.0 2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE [V]
5.0
5.5
0.8
0.6
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
5.5
Figure 2. EN High Threshold vs. Input Voltage
Figure 3. Quiescent Current vs. Input Voltage
(full load)
1.0
0.8
0.6
0.4
0.2
0.0
−0.2
−0.4
−0.6
−0.8
−1.0
2.5
3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
5.5
Figure 4. LED Current Change vs. Input Voltage
10
8
6
4
2
0
−2
−4
−6
−8
−10
−40
0 40 80
TEMPERATURE [°C]
120
Figure 5. LED Current Change vs. Temperature
http://onsemi.com
5
5 Page 
D
e
TOP VIEW
CAT4003B, CAT4004B
PACKAGE DIMENSIONS
TSOT−23, 6 LEAD
CASE 419AF−01
ISSUE O
E1 E
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
θ
MIN
0.01
0.80
0.30
0.12
0.30
0º
NOM
0.05
0.87
0.15
2.90 BSC
2.80 BSC
1.60 BSC
0.95 TYP
0.40
0.60 REF
0.25 BSC
MAX
1.00
0.10
0.90
0.45
0.20
0.50
8º
A2 A
b A1
SIDE VIEW
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-193.
q
L
L1
END VIEW
c L2
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CAT4004B.PDF ] | |
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