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CAT4104 PDF даташит

Спецификация CAT4104 изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «700mA Quad Channel Constant Current LED Driver».

Детали детали

Номер произв CAT4104
Описание 700mA Quad Channel Constant Current LED Driver
Производители ON Semiconductor
логотип ON Semiconductor логотип 

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CAT4104 Даташит, Описание, Даташиты
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700 mA Quad Channel Constant Current LED Driver
CAT4104
FEATURES
„ 4 matched LED current sinks up to 175 mA
„ Up to 25 V operation on LED pins
„ Low dropout Current Source (0.4 V at 175 mA)
„ LED current set by external resistor
„ High frequency PWM dimming via EN/PWM
„ “Zero” current Shutdown mode
„ Thermal shutdown protection
„ RoHS-compliant TDFN 8-Pad 2 x 3 mm and
SOIC 8-Lead packages
APPLICATIONS
„ Automotive Lighting
„ General and Architectural Lighting
„ LCD backlight
ORDERING INFORMATION
Part
Number
Package
Quantity
per Reel
Package
Marking
CAT4104V-GT3 SOIC-8*
CAT4104VP2-GT3 TDFN-8*
3,000
3,000
CAT4104V
HC
* Lead Finish is NiPdAu
DESCRIPTION
The CAT4104 provides four matched low dropout current
sinks to drive high-brightness LED strings up to 175 mA
per channel. The LED channel current is set by an
external resistor connected to the RSET pin. The LED
pins are compatible with high voltage up to 25 V
supporting applications with long strings of LEDs.
The EN/PWM logic input supports the device enable and
high frequency external Pulse Width Modulation (PWM)
dimming control.
Thermal shutdown protection is incorporated in the device
to disable the LED outputs whenever the die temperature
exceeds 150ºC.
The device is available in the 8-pad TDFN 2 mm x 3 mm
package and the SOIC 8-Lead 150 mil wide package.
PIN CONFIGURATION
TDFN 8-Pad (Top View)
LED1 1
LED2 2
LED3 3
LED4 4
8 RSET
7 VIN
6 EN/PWM
5 GND
SOIC 8-Lead (Top View)
LED1
1
8 RSET
LED2
2
7 VIN
LED3
3
6 EN/PWM
LED4
4
5 GND
TYPICAL APPLICATION CIRCUIT
VCC
3 V to 25 V
LEDs
VIN
5V
OFF ON
R1
768
CAT4104
VIN LED1
LED2
EN/PWM
LED3
RSET
LED4
GND
175 mA
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
1
Doc. No. MD-5041 Rev. B









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CAT4104 Даташит, Описание, Даташиты
CAT4104
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, RSET, EN/PWM Voltages
LED1, LED2, LED3, LED4 Voltages
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Rating
-0.3 to 6
-0.3 to 25
-65 to +160
-40 to +150
300
Unit
V
V
°C
°C
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Voltage applied to LED1 to LED4, outputs off
Voltage applied to LED1 to LED4, outputs on
Ambient Temperature Range
ILED per LED pin
Rating
3.0 to 5.5
up to 25
up to 6*
-40 to +85
10 to 175
Unit
V
V
V
°C
mA
* Keeping LEDx pin voltage below 6 V in operation is recommended to minimize thermal dissipation in the package.
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
Min and Max values are over the recommended operating conditions unless specified otherwise.
Typical values are at VIN = 5.0 V, TAMB = 25°C
Symbol Name
Conditions
Min Typ
ILED-ACC LED Current Accuracy
ILEDNOM ILED
ILEDNOM
ILED-DEV LED Channel Matching
ILED ILEDAVG , note 1
ILED
VDOUT Dropout Voltage
ILED = 175 mA
VRSET RSET Pin Voltage
IQ Quiescent Current
No LED, RSET = Float
No LED, RSET = 770
IQSHDN Shutdown Current
VEN = 0V
REN/PWM
VHI
VLO
EN/PWM Pin
Internal pull-down resistance
Logic High Level
Logic Low Level
TSD Thermal Shutdown
THYS Thermal Hysteresis
ILED/IRSET RSET to LED Current gain ratio
25 mA LED current
VUVLO Undervoltage lockout (UVLO) threshold
Note 1: Min and Max values are tested for ILED = 50 mA, VIN = 3.5 V, VLEDx = 0.4 V, TAMB = 25°C.
-5
1.17
1.3
±2
±1
400
1.2
0.6
6
200
150
20
100
2.0
Max Units
%
+5 %
1.23
1
mV
V
mA
mA
µA
k
V
0.4 V
°C
°C
V
Doc. No. MD-5041 Rev. B
2 © 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice









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CAT4104 Даташит, Описание, Даташиты
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CAT4104
RECOMMENDED EN/PWM TIMING
Min and Max values are over the recommended operating conditions unless specified otherwise.
Typical values are at VIN = 5.0 V, TAMB = 25°C
Symbol Name
Conditions Min Typ Max
TPS
Turn-On time, EN/PWM rising to ILED
from shutdown
ILED = 175 mA
ILED = 80 mA
TP1 Turn-On time, EN/PWM rising to ILED ILED = 175 mA
1.5
1.3
600
TP2
Turn-Off time, EN/PWM falling to ILED
ILED = 175 mA
ILED = 80 mA
400
300
TR LED rise time
ILED = 175 mA
ILED = 80 mA
700
440
TF LED fall time
TLO EN/PWM low time
ILED = 175 mA
ILED = 80 mA
1
360
320
THI EN/PWM high time
5
TPWRDWN EN/PWM low time to shutdown delay
48
Units
μs
ns
ns
ns
ns
μs
μs
ms
EN/PWM
SHUTDOWN
TP2
TPS
LED CURRENT
SHUTDOWN 0 mA
50%
THI
TLO
TPWRDWN
POWERDOWN
SHUTDOWN 0 mA
TP1 TR
TF
ILED =
1.2 V
RSET
x 100
90%
50%
10% 0 mA
QUIESCENT CURRENT
SHUTDOWN 0 mA
Figure 1. CAT4104 EN/PWM Timing
SHUTDOWN 0 mA
EN/PWM OPERATION
The EN/PWM pin has two primary functions. One
function enables and disables the device. The other
function turns the LED channels on and off for PWM
dimming control. The device has a very fast turn-on
time (from EN/PWM rising to LED on) and allows
“instant on” when dimming LED using a PWM signal.
Accurate linear dimming is compatible with PWM
frequencies from 100 Hz to 5 kHz for PWM duty cycle
down to 1%. PWM frequencies up to 50 kHz can be
supported for duty cycles greater than 10%.
When performing a combination of low frequencies
and small duty cycles, the device may enter shutdown
mode. This has no effect on the dimming accuracy,
because the turn-on time TPS is very short, in the
range of 1 µs.
To ensure that PWM pulses are recognized, pulse
width low time TLO should be longer than 1 µs. The
CAT4104 enters a “zero current” shutdown mode after
a 4 ms delay (typical) when EN/PWM is held low.
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
3
Doc. No. MD-5041 Rev. B










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