CAT4134
500mA Dual Channel Movie/Flash LED
Driver
FEATURES
Dual Mode (Movie or Flash) operation
Independent Movie/Flash LED current control
Can drive 2, 3, 4 or 6 LEDs
High LED Current (250mA max per channel)
Power efficiency up to 85%
Dual frequency mode 1.2MHz and 900kHz
Soft-start inrush current
Adjustable overvoltage protection
Thermal shutdown protection
Operating temperature range -40ºC to +85ºC
12-pad TDFN 3mm x 3mm package
DESCRIPTION
The CAT4134 is a high power, dual channel boost
converter which provides two matched LED currents.
Output current levels are controlled by one of two
resistors RSET or RFLASH. When the FLASH input pin
is low (movie mode), RSET sets the current. When
FLASH is high (flash mode), the resistor RFLASH sets
the LED current. Each channel drives two or three white
LEDs in series and provides a regulated current to
control their brightness. Input supply down to 3V is
supported, making the device ideal for Li-Ion battery
applications.
High frequency low noise operation allows the device to
be used with small external inductors and ceramic
capacitors while still maintaining excellent efficiency.
When not in use the device can be placed into a “zero”
quiescent mode via the shutdown pin.
In addition to soft-start control and current limiting, the
CAT4134 include thermal shutdown protection. A
dedicated overvoltage pin (OVP) allows the user to limit
the maximum LED supply voltage. The device is
packaged in the 12-pad TDFN 3mm x 3mm.
Quantity Package
per Reel Marking
2,000
HAAS
2,000
HAAU
APPLICATIONS
C
amera flash
Flash light
High-power white LEDs
Digital still cameras
Color LCD backlighting
ORDERING INFORMATION
Part Number
Package
CAT4134HV2-T2
TDFN-12
(1)
CAT4134HV2-GT2 TDFN-12
(2)
For Ordering Information details, see page 12.
Notes:
(1) Matte-Tin Plated Finish (RoHS-compliant).
(2) NiPdAu Plated Finish (RoHS-compliant).
PIN CONFIGURATION
12-Pad TDFN 3mm x 3mm
Top View
VIN
3V to 4.2V
TYPICAL APPLICATION CIRCUIT
L
C1
10µF
VIN
EN
OFF ON
22µH
D
C2
SW
10µF
R1
VOUT
FLASH
EN
PGND
AGND
LED2
LED1
1
2
3
4
5
6
TAB is GND
12 OVP
11 SW
10 SW
9
8
7
VIN
RSET
RFLASH
CAT4134
LED1
LED2
OVP
1MΩ
FLASH
RFLASH
RFLASH
18kΩ
RSET
20kΩ
RSET
R2
AGND
PGND
L = Sumida CDRH3D16-220
D = Central CMDSH05-4 (500mA)
C2 = 10µF (rated 16V)
100kΩ
Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
1
Doc. No. MD-5021 Rev. B
CAT4134
ABSOLUTE MAXIMUM RATINGS
Parameters
SW voltage
VIN voltage
EN, FLASH, RSET, RFLASH voltage
LED1, LED2 voltage
Output Current per Channel
Storage Temperature Range
Junction Temperature Range
Lead Temperature
ESD Rating – Human Body Model (HBM)
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Ambient Temperature Range
Flash mode current per channel
Movie mode current per channel
ELECTRICAL OPERATING CHARACTERISTICS
Over recommended operating conditions unless specified otherwise.
V
IN
= 3.6V, EN = V
IN
and at ambient temperature of 25ºC.
Symbol Parameter
I
Q
Quiescent Current
(not switching)
I
SD
I
SW
R
SW
I
LK
F
OSC
V
OVP
η
T
SD
T
HYST
V
UVLO
Shutdown Current
Switch Current Limit
Switch Resistance
Switch Leakage Current
Oscillator Frequency
OVP pin threshold
Efficiency
Thermal Shutdown
Thermal Hysteresis
Undervoltage Lock Out
(UVLO) Threshold
Disabled when V
IN
< V
UVLO
V
OUT
= 10V, Load = 200mA
Conditions
V
LED1
> 0.5V, V
LED2
> 0.5V
EN = 0V
Movie Mode (FLASH = Low)
Flash Mode (FLASH = High)
I
SW
= 1000mA
Switch Off, V
SW
= 5V
Movie Mode
Flash Mode
1.10
1.2
0.9
1.20
85
150
20
1.9
2.2
1.30
0.5
1.7
Min
Typ
100
1
1
2
0.3
0.5
5
Max
250
Unit
µA
µA
A
Ω
µA
MHz
V
%
ºC
ºC
V
Range
2.8 to 4.2
-40 to +85
25 to 250
5 to 50
Units
V
°C
mA
mA
Ratings
20
8
VIN + 0.6V
8
300
-65 to +160
-40 to +125
300
2000
Units
V
V
V
V
mA
°C
°C
°C
V
EN LOGIC CONTROL INPUT
V
SDHI
V
SDLO
I
SDBIAS
Logic High Threshold
Logic Low Threshold
Input Bias current
EN > V
SDHI
Enables Device
EN = 3V
0.4
0.7
0.7
10
1.5
40
V
µA
Doc. No. MD-5021 Rev. B
2
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
CAT4134
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Over recommended operating conditions unless specified otherwise.
VIN = 3.6V, EN = VIN and at ambient temperature of 25ºC.
Symbol Parameter
V
RSET
RSET pin voltage
V
RFLASH
V
LED
RFLASH pin voltage
LED1, LED2 Pin Voltage
(whichever is the lower)
Programmed LED Current
LED Current Adjust Range
per LED output
LED Current Accuracy
LED Current Matching
Conditions
22kΩ < R
SET
< 200kΩ
22kΩ < R
FLASH
< 200kΩ
Both Flash and Movie Mode
(lower voltage pin is regulated)
R
SET
= 21.6kΩ
R
FLASH
= 43.2kΩ
R
FLASH
= 21.6kΩ
In Movie mode
In Flash mode
Min
1.10
1.10
Typ
1.20
1.20
400
20
50
100
5
25
±5
±5
50
200
Max
1.30
1.30
Unit
V
V
mV
mA
mA
%
%
I
LED
I
LED-RAN
I
LED-ACC
I
LED-DEV
FLASH CONTROL LOGIC INPUT
V
FHI
V
FLO
I
INPUT
Logic High Threshold
Logic Low Threshold
Input Bias current
FLASH > V
FHI
Flash Enabled
FLASH = 3V
0.4
0.7
0.7
10
1.5
40
V
µA
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
3
Doc. No. MD-5021 Rev. B
CAT4134
TYPICAL CHARACTERISTICS
VIN = 3.6V, FLASH = VIN, C
IN
= 4.7µF, C
OUT
= 10µF, L = 22µH with 2 LEDs at 100mA, T
AMB
= 25ºC, unless
otherwise specified.
LED Current Regulation (100mA load)
2.0
LED CURRENT CHANGE [%]
LED CURRENT CHANGE [%]
LED Current Regulation (200mA load, Flash)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE [V]
2 LEDs
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE [V]
2 LEDs
1 LED
Current Gain vs. RFLASH
CURRENT GAIN (Iout / Iflash) .
1900
LED Current Regulation (100mA load, Flash)
2.0
LED CURRENT CHANGE [%]
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE [V]
1850
1800
1750
1700
1650
1600
0
2 LEDs
VIN= 3.6V
2 LEDs at 100mA
50
100
150
Rflash [kohm]
200
Efficiency vs. Output Current (Flash mode)
90
EFFICIENCY (%) .
Efficiency vs. Input Voltage (Flash mode)
90
EFFICIENCY (%) .
80
70
60
2 LEDs at 100mA
50
40
80
70
60
50
40
0
50
100
150
200
250
TOTAL LED CURRENT [mA]
VIN = 3.6V
2 LEDs
2.5
3.0
3.5
4.0
4.5
5.0
INPUT VOLTAGE [V]
Doc. No. MD-5021 Rev. B
4
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
CAT4134
TYPICAL CHARACTERISTICS
VIN = 3.6V, FLASH = VIN, C
IN
= 4.7µF, C
OUT
= 10µF, L = 22µH with 2 LEDs at 100mA, T
AMB
= 25ºC, unless
otherwise specified.
Power-up Transient (2 LEDs at 200mA)
Power-up Transient (2 LEDs at 200mA)
Power-up Transient (2 LEDs at 200mA)
Power-up Transient (2 LEDs at 200mA)
Switching Waveform in Flash mode (2 LEDs)
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.
5
Doc. No. MD-5021 Rev. B
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