CAT4109V-GT2 ON Semiconductor, CAT4109V-GT2 Datasheet - Page 8

• Manufacturer Part Number: CAT4109V-GT2
• Description: IC LED DRIVER RGB 16-SOIC
• Manufacturer: ON Semiconductor
• Type: RGB LED Driverr

Specifications of CAT4109V-GT2

• Constant Current: Yes
• Topology: PWM
• Number Of Outputs: 3
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 25V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 175mA
• Internal Switch(s): No
• Operating Supply Voltage (typ): 3.3/5V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: SOIC
• Pin Count: 16
• Mounting: Surface Mount
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 5.5V
• Number Of Digits: 3
• Low Level Output Current: 175 mA
• High Level Output Current: 200 mA
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Supply Current: 10 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -
• Efficiency: -
• Lead Free Status / Rohs Status: Compliant
• Other names: CAT4109V-GT2TR

Basic Operation
accurately regulate the current in each LED channel to 400
times the current sink from the corresponding RSET pin.
Each of the resistors tied to the RSET1, RSET2, RSET3 pins
set the current respectively in the LED1, LED2, and LED3
channels. Table 6 shows standard resistor values for RSET
and the corresponding LED current.
Table 6. RSET RESISTOR SETTINGS
The CAT4109 uses 3 independent current sinks to
LED Current [mA]
100
175
20
60
RSET3
RSET2
RSET1
PWM1
PWM2
PWM3
VDD
OE
Figure 14. CAT4109 Functional Block Diagram
RSET [kW]
24.9
8.45
5.23
3.01
Current Setting
Current Setting
Current Setting
1.2 V Ref
BLOCK Diagram
http://onsemi.com
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a wide range of input and LED voltages due to independent
current sensing circuitry on each channel. The LED
channels have a low dropout of 0.4 V or less for all current
ranges and supply voltages. This helps improve heat
dissipation and efficiency.
outputs to off. Once the VDD supply voltage is greater than
the under−voltage lockout threshold, the device channel can
be turned on. The on/off state of each channel LED1, LED2
and LED3 is independently controlled respectively by
PWM1, PWM2, PWM3. When a PWMx is high, the
associated LEDx channel is turned on.
LED1 LED2 LED3
Tight current regulation for all channels is possible over
Upon power−up, an under−voltage lockout circuit sets all
PGND
CURRENT
SINKS
GND