cat4004 Catalyst Semiconductor, cat4004 Datasheet
cat4004
Available stocks
Related parts for cat4004
cat4004 Summary of contents
Page 1
... Catalyst Semiconductor, Inc. Characteristics subject to change without notice DESCRIPTION The CAT4004 provides four matched low dropout current sources to drive LEDs. An external resistor on RSET sets the current in the LED channels. 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 ...
Page 2
... CAT4004 ABSOLUTE MAXIMUM RATINGS Parameter VIN, LEDx, RSET EN/DIM Voltage Storage Temperature Range Junction Temperature Range Lead Temperature RECOMMENDED OPERATING CONDITIONS Parameter V IN Ambient Temperature Range I per LED pin LED Typical application circuit with external components is shown on page 1. ELECTRICAL OPERATING CHARACTERISTICS ...
Page 3
... Pulses faster than the mini- mum T may be ignored and filtered by the device. LO Pulses longer than the maximum T device. The LED driver enters a “zero current” shutdown mode if EN/DIM is held low for 1.5ms or more. 3 CAT4004 Min Typ Max Units 10 μs 0.2 100 μ ...
Page 4
... CAT4004 TYPICAL PERFORMANCE CHARACTERISTICS 3.3V 80mA (4 LEDs at 20mA OUT Quiescent Current vs. Input Voltage 1.4 1.2 1.0 0.8 0.6 2.5 3.0 3.5 4.0 INPUT VOLTAGE [V] LED Current Change vs. Input Voltage 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 3.0 3.5 4.0 INPUT VOLTAGE [V] LED Current vs. RSET Resistor RSET [kΩ] © Catalyst Semiconductor, Inc. Characteristics subject to change without notice = 1μ ...
Page 5
... Catalyst Semiconductor, Inc. Characteristics subject to change without notice = 1μ 25°C unless otherwise specified. IN AMB RSET Pin Voltage vs. Temperature 0.7 0.6 0.5 0.4 0.3 0 3.0 2.5 2.0 5 CAT4004 - 120 TEMPERATURE [°C] Dropout Characteristics 0 50 100 150 200 250 300 LED PIN VOLTAGE [mV] Doc. No. MD-5024 Rev. B ...
Page 6
... CAT4004 TYPICAL PERFORMANCE CHARACTERISTICS 3.3V 80mA (4 LEDs at 20mA OUT Power Up Waveform Line Transient Waveform 4V to 5.5V Doc. No. MD-5024 Rev 1μ 25°C unless otherwise specified. IN AMB Power Down Waveform Dimming Waveform 80mA to 40mA 6 Characteristics subject to change without notice © Catalyst Semiconductor, Inc. ...
Page 7
... GND is the ground reference for the device. The pin must be connected to the ground plane on the PCB. TAB is the exposed pad underneath the package. For best thermal performance, the tab should be soldered to the PCB and connected to the ground plane. 7 CAT4004 ) to set the full SET Doc. No. MD-5024 Rev. B ...
Page 8
... CAT4004 BLOCK DIAGRAM V IN VIN RSET EN/DIM Figure 2. CAT4004 Functional Block Diagram BASIC OPERATION The CAT4004 uses four tightly matched current sinks to accurately regulate LED current in each channel proportional to the current sourced from the RSET pin × I GAIN LED R SET There are six different gain settings for LED brightness that can be set through the EN/DIM pin ...
Page 9
... For current Tape & Reel information, download the pdf file from: http://www.catsemi.com/documents/tapeandreel.pdf Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC standard MO-229. © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SIDE VIEW MAX A2 0.80 0.05 0.65 0.30 2.10 1.50 3.10 1.40 0.40 9 CAT4004 e b PIN#1 IDENTIFICATION D2 L BOTTOM VIEW A3 FRONT VIEW Doc. No. MD-5024 Rev. B ...
Page 10
... All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT4004VP2-GT3 (TDFN, NiPdAu Plated Finish, Tape & Reel 3000). (4) For Matte-Tin package option, please contact your nearest Catalyst Semiconductor Sales office. Doc. No. MD-5024 Rev. B ...
Page 11
... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...