CAT3614HV2-T2 Integrated Circuits (ICs)

Voltage - Output:	7V
Base Part Number:	CAT3614
Supplier Device Package:	12-TDFN (3x3)
Package / Case:	12-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Backlight
Dimming:	Multi-Step
Frequency:	1MHz
Current - Output / Channel:	31mA
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	3V
Number of Outputs:	4
Internal Switch(s):	Yes
Topology:	Switched Capacitor (Charge Pump)
Type:	DC DC Regulator
Part Status:	Obsolete
Packaging:	Cut Tape (CT)

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CAT3614HV2-T2 application field and working principleCAT3614HV2-T2 is a highly efficient, low-side cascode LED driver designed for LED lighting applications. It combines LED switching and LED dimming control. This LED driver is a perfect choice for LED lighting applications such as camping lanterns, flashlights, display cases, and automotive lighting. CAT3614HV2-T2 belongs to PMIC - LED Drivers. It has a wide range of benefits including low voltage operation from 2.7V to 5.5V, typical shutdown current of 2.2μA, low quiescent current of 2.4mA, and fast current settling time. It is also very integrated, providing adjustable output voltage up to 13V, maximum LED current of 1A, adjustable LED output current from 50mA to 1000mA, and input voltage of 20V. Moreover, it features high-side N-channel FET switching for LED control and PWM control for LED dimming.Working PrincipleThe CAT3614HV2-T2 provides both LED switching and LED dimming control. It uses a cascade network of P-channel FETs and N-channel FETs to drive the LEDs. The power supply input is connected to the source of the upper P-Channel FETs with the aid of a bypass capacitor to either the VADJ pin or the VDD pin. A PFM control circuit including an internal oscillator, two N-channel drivers, and internal resistors is used to ramp the dimming signal to an adjustable range by adjusting the PFM duty cycle. The signal coming from the output of the PFM control network is connected to the gate of the lower N-channel FETs, enabling the current flow into the LEDs. The switching signal enables or disables the gate of the top N-channel FETs, controlling the overall LED switching. A discrete feedback loop aids in controlling the MOSFET cascode circuitry to maintain a set current in the LEDs.The CAT3614HV2-T2 features a comprehensive protection scheme for the load, the device, and the LEDs. It is suitable for overvoltage, reverse polarity, open/short load, and over current/temperature conditions. It has a soft-start and hiccup mode protection to maintain the output current within the configured limits under over-current conditions. The CAT3614HV2-T2 is compatible with a wide variety of transistor technologies and supports dimmer phase-cut dimming, Triac dimming and pulse-width modulation (PWM) LED dimming interface. This LED driver IC is especially suitable for automotive LED lighting applications, as it provides up to 20V of input voltage.ConclusionCAT3614HV2-T2 is an essential power management integrated circuit for LED lighting applications. Its integrates LED switching and LED dimming control, providing versatile, low-side cascode LED driver. It offers adjustable output voltage up to 13V, a typical shutdown current of 2.2μA, and a low quiescent current of 2.4mA. It has PFM control for LED dimming and supports dimmer phase-cut dimming, Triac dimming and PWM LED dimming interface. Most importantly, its comprehensive protection scheme ensures overall safety and reliability. It is suitable for low voltage operation from 2.7V to 5.5V and supports up to 20V of input voltage, making it ideal for automotive LED lighting applications.

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