cat3626 Catalyst Semiconductor, cat3626 Datasheet
cat3626
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cat3626 Summary of contents
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... Catalyst Semiconductor, Inc. Characteristics subject to change without notice 2 C™ Interface PRODUCT DESCRIPTION The CAT3626 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in six LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current. ...
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... CAT3626 ABSOLUTE MAXIMUM RATINGS Parameters VIN, LEDxx voltage VOUT, C1±, C2± voltage EN, SDA, SCL voltage Storage Temperature Range Junction Temperature Range Lead Temperature RECOMMENDED OPERATING CONDITIONS Parameter VIN Ambient Temperature Range LED forward voltage I per LED pin LED Typical application circuit with external components is shown on page 1. ...
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... Characteristics subject to change without notice t t HIGH t t LOW LOW t SU:DAT HD:DAT Figure Bus Timing Characteristics 3 Min Typ Max 400 0.9 1.2 0.6 1.2 0.6 0.6 0 100 0.3 300 0 SU:STO t BUF Doc. No. MD-5014 Rev. C CAT3626 Unit kHz µs µs µs µs µs µ µs ns µs ns ...
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... CAT3626 TYPICAL CHARACTERISTICS V = 3.6V 90mA (6 LEDs at 15mA OUT Efficiency vs. Supply Voltage (6 LEDs) 100 1x Mode 15mA per LED 20mA per LED 40 4.2 4.0 3.8 3.6 SUPPLY VOLTAGE [V] Quiescent Current vs. Supply Voltage (1x Mode) 0.8 0.6 0.4 6 LEDs OFF 0.2 0 3.0 3.2 3.4 3.6 3.8 SUPPLY VOLTAGE [V] Quiescent Current vs. Supply Voltage (1.5x Mode LEDs OFF ...
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... OUT LED Current Change vs. Temperature 1x Mode 3.8 4.0 4.2 Switching Frequency vs. Temperature 3.6 3.8 4.0 Output Resistance vs. Supply Voltage(1.5x Mode) 3.8 4.0 4 1µ 25ºC, unless otherwise specified. AMB 5.0 4.0 3.0 2.0 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 -40 - TEMPERATURE [°C] 1.3 1.2 1.1 1.0 0.9 0.8 0.7 - 120 TEMPERATURE [°C] 4.0 3.5 3.0 2.5 2.0 1.5 1.0 3.0 3.2 3.4 3.6 3.8 4.0 4.2 SUPPLY VOLTAGE [V] Doc. No. MD-5014 Rev. C CAT3626 80 ...
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... CAT3626 TYPICAL CHARACTERISTICS V = 3.6V 90mA (6 LEDs at 15mA OUT Power Up with 6 LEDs at 15mA (1x Mode) Enable Power Down (1x Mode) Switching Waveforms in 1.5x Mode Doc. No. MD-5014 Rev 1µ 25ºC, unless otherwise specified OUT AMB Power Up with 6 LEDs at 15mA (1.5x Mode) Enable Power Down (1 ...
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... Catalyst Semiconductor, Inc. Characteristics subject to change without notice , 1µ OUT Foldback Current Limit 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 SDA, SCL V 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 5.0 5.5 3.0 7 CAT3626 = 25ºC, unless otherwise specified. AMB 1x Mode 0 100 200 300 400 OUTPUT CURRENT [mA] vs. Supply Voltage IL 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE [V] Doc. No. MD-5014 Rev. C ...
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... CAT3626 PIN DESCRIPTIONS Pin # Name Function 1 LEDA1 Cathode terminal of LED SDA I C Serial data input/output 2 3 SCL I C Serial clock input 4 EN Enable input 5 VOUT Charge pump output connected to the LED anodes 6 VIN Supply voltage 7 C1- Bucket capacitor 1 terminal 8 C1+ ...
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... SCL Interface Figure 2. CAT3626 Functional Block Diagram BASIC OPERATION At power-up, the CAT3626 starts operating in 1x mode where the output will be approximately equal to the input supply voltage (less any internal voltage losses). If the output voltage is sufficient to regulate all LEDs currents the device remains in 1x operating mode. ...
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... CAT3626 Table 1. Register address and data configuration Register Register name Address Bit 7 RegA 0 X RegB 1 X RegC 2 X RegEn 3 X The table 2 lists the various LED currents with the associated RegA, RegB, and RegC register values. Table 2. LED Current Selection and Register Value ...
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... Acknowledge sent by the slave LED driver (SDA high) A*: Not Acknowledge sent by the master microcontroller (SDA low) P: Stop condition Device address 7 bits (MSB first, slave address is 1100110). Device register address 8 bits Data to read or write 8 bits Write Instruction Sequence 11 CAT3626 by the master controller/CPU 2 C protocol, please refer to the I Slave address R A ...
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... ADDRESS R/W START Condition TYPICAL APPLICATION The CAT3626 is ideal for driving RGB (red green blue) LEDs with common anode configuration. The individual LED currents associated with the red, green and blue LEDs are programmable independently through the I interface, allowing to generate an accurate color ...
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... Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC standard MO-220. © Catalyst Semiconductor, Inc. Characteristics subject to change without notice SIDE VIEW MAX 0.80 0.05 L 0.35 4.10 2.20 4.10 2. CAT3626 DETAIL A PIN BOTTOM VIEW b e DETAIL A A3 FRONT VIEW Doc. No. MD-5014 Rev. C ...
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... 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 CAT3626HV4–GT2 (TQFN, NiPdAu Plated Finish, Tape & Reel 2000). (4) For Matte-Tin package option, please contact your nearest Catalyst Semiconductor Sales office. Doc. No. MD-5014 Rev. C ...
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... 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. ...