Video and digital camera applications have a variety of power management challenges created by the lack of standardization of battery sources. Both single cell Li-Ion/Polymer and two series connected NiMH are in use today, which creates the need for LCD display LED backlighting, LCD biasing and RGB indicator lamps, in addition to high efficiency step-up and step-down converters. Due to the differing charging characteristics of the two battery types, input port protection is especially critical to avoid catastrophic failures.


Buck and Boost Converters

Video and digital cameras need high efficiency power conversion to create regulated voltage rails from their battery source supply to maximize operating times between charge cycles.

  • Point of load voltage regulators provide a local supply rail with high efficiency
  • Single output high efficiency DC/DC switching regulators can provide either a step-up or step-down voltage output.
Part Number Description
KTB851 600mA Step-down Converter with Output Load Discharge
KTB851-1 600mA Step-down Converter
KTC218 Wide Output Range Step-Up Converter

LCD Backlight LED Drivers

Video and digital cameras utilize color LCD displays for the image viewfinder as well as displaying camera functions and controls. Color LCD displays use white LED backlighting that require backlight power management solutions to provide high power conversion efficiency with flexible dimming control to maximize battery life between charge cycles.

LEDs are normally connected in series and therefore require a compliance voltage significantly higher than the battery voltage.

  • Panel size and resolution determine the number of white LEDs (WLED) required to produce the necessary screen brightness
  • Dimming techniques to control the brightness can range from simple linear LED brightness control to sophisticated high efficiency PWM control to achieve contrast ratios of typically 20,000:1
  • High accuracy current sinks to provide uniform backlight across larger panel sizes
  • High efficiency boost power conversion required to minimize demands on battery power consumption and maximize the battery life between charge cycles

Product Highlights:

  • Multiple series/parallel strings of WLED drivers to match the display panel needs
  • Multiple programming options from simple PWM signal control to full-featured I2C interfaces.
  • Advanced design, low drop-out current sinks with tight linearity characteristics to maintain constant LED current accuracy over all battery voltage extremes
  • High efficiency boost converters with integrated protection against LED open and short-circuit conditions
Part Number Description
KTD104 Linear-mode 4-Channel LED Driver
KTD105 Linear-mode 5-Channel LED Driver
KTD108 Linear-mode 4-Channel LED Driver
KTD109 Linear-mode 5-Channel LED Driver
KTD117 Linear-mode 4+2 -Channel LED Driver
KTD251 Step-Up LED Driver with PWM Control
KTD2531 Step-Up LED Driver with PWM Control
KTD2536 Step-Up LED Driver with PWM Control
KTD2500 Step-Up LED Driver with ExpressWire or PWM Control
KTD2505R Step-Up LED Driver with ExpressWire or PWM Control
KTD2511C Step-Up LED Driver with PWM Control
KTD2511D Step-Up LED Driver with PWM Control
KTD2801 Step-Up LED Driver with Internal Diode and ExpressWire/PWM Dimming
KTD2801A Step-Up LED Driver with Internal Diode and ExpressWire/PWM Dimming
KTD314 High Efficiency, Wide Voltage Range 20-LED Driver
KTD315 High Efficiency, Wide Voltage Range 30-LED Driver
KTD3112 High Efficiency Step-Up 2-Ch LED Driver, 25V OVP
KTD3113 High Efficiency Step-Up 3-Ch LED Driver, 25V OVP
KTD3116-1 High Efficiency Step-Up 2-Ch LED Driver, 31V OVP
KTD3117-1 High Efficiency Step-Up 3-Ch LED Driver, 31V OVP
KTD3118 High Efficiency Step-Up 2-Ch LED Driver, 42V OVP
KTD3119 High Efficiency Step-Up 3-Ch LED Driver, 42V OVP
KTD3122 2-Ch Step-Up LED Driver with Integrated Power Diode
KTD3137 High Efficiency 3-Channel LED Backlight with Panel Flash Function
KTD3156 6-Ch Step-Up LED Driver with PWM-Control Mixed-Mode Dimming
KTD3156B 6-Ch Step-Up LED Driver with PWM-Control Mixed-Mode Dimming, low duty dimming
KTD325 High Efficiency, Wide Voltage Range 30-LED RGB Driver

LCD Bias Supplies

LCD panels for video and digital cameras require low-noise and regulated positive/negative bias supply voltages that must be stepped up and inverted from a single smartphone battery.

  • All LCD displays require one positive and one negative supply, both higher than the battery voltage
  • Panel size determines voltage and maximum load current requirements

Product Highlights:

  • Single inductor topology for high power conversion efficiency with minimized solution size to support I2C programmable 2-channel output operation
  • Advanced LCD bias drivers providing adjustable boost headroom options to maximize efficiency to specific application conditions
  • Low battery power consumption further reduced during shutdown by minimizing unnecessary leakage current on the I2C bus
  • High integration increasing performance, while decreasing the overall size and BOM
Part Number Description
KTD2150 2-Channel LCD Panel Bias Supply with Single Inductor
KTD2151 2-Channel LCD Panel Bias Supply with Single Inductor
KTD2151B 2-Channel LCD Panel Bias Supply with Single Inductor
KTD2159 2-Channel LCD Panel Bias Supply with Single Inductor

Over-Voltage and Surge Protection

Input power port protection is a paramount concern in video and digital still camera design, as multiple power sources may be used.

  • Over-voltage, and surge protected load switches protect battery charge management and operating handset circuits, by breaking the connection between the power source and the internal circuitry, in the event the device is connected to a faulty power source or subjected to an abnormal stress condition.

Product Highlights:

  • Programmable and fixed over-voltage protection (OVP) shutdown thresholds.
  • Input protection
    • Wrong adapter up to +40V
    • Reverse voltage down to -6V
    • Transient voltage protection up to 200V, compliant to IEC61000-4-2 (Level 4)
    • ESD protection compliant to ±8kV contact, ±15kV air gap and ±2kV human body model.
  • Single or dual devices with Uni or Bi-directional blocking

Integrated load switches provide internal power switching and are controlled by simple GPIO logic.

  • Eliminate the need for bias and level shift circuits associated with discrete MOSFET switches
  • Provides slew-rate limited turn-on with reverse current blocking and output discharge mode to de-select functions when not required to extend battery life.

Product Highlights:

  • Extremely low IN to OUT resistance
  • Tiny footprint
  • Operation down to 1.8V
Part Number Description
KTS1601 SRC P-Ch Load Switch with Reverse Blocking
KTS1601-1 SRC P-Ch Load Switch with Reverse Blocking and Output Discharge
KTS1605 SRC P-Ch Load Switch with Reverse Blocking
KTS1605-1 SRC P-Ch Load Switch with Reverse Blocking and Output Discharge
KTS1612 Dual-Input Push Button Reset IC with Two Discharge Paths
KTS1613 Dual-Input Push Button Reset IC
KTS1656 Surge Protected, Single Input, Dual Output Load Switch Protection with OVP
KTS1662 Load Switch with fixed and adjustable OVP
KTS1670 Adjustable Over-Voltage Protection Switch
KTS1671 Load Switch with fixed and adjustable OVP
KTS1674 OVP Switch with Reverse Blocking and 100V surge Protection
KTS1676 Over-voltage Protector with Bidirectional Blocking and Surge Protection
KTS1678 OVP Switch with Single Input, Dual Output Switches with Surge Protection and Individual Enables
KTS1679-1 OVP Switch with Single Input, Dual Output Switches with 10V Surge Protection, Individual Enables, Selectable OVP & BAT SNS pin
KTS1680 100V Surge Protected OVP Switch
KTS1681 Ultra-Fast 100V Surge Protected OVP Switch, with VDET output and MIC function
KTS1681A 4 Amp Over-Voltage Protection IC with Sense Output
KTS1682 Ultra-Fast 100V Surge Protected OVP Switch, with VDET output and MIC function
KTS1685 OVP Switch with 100V Surge Protection
KTS1686 Ultra-Fast 100V Surge Protected OVP Switch, with Bidirectional Blocking
KTS1688 OVP Switch with Reverse Blocking and Current Limiting
KTS1689A 100V Surge Protected OVP Switch

RGB LED Drivers

Video and digital cameras use multicolor RGB LEDs are often used as function indicator lamps or for fashion lighting.

  • RGB LED drivers allow simplified programmable control of LED color and brightness

Product Highlights:

  • 3-channel RGB LED drivers permit custom color control
  • 4-channel RGBW devices allow for driving a white LED in addition to the RGB LED
  • Multiple programming options include I2C or ExpressWire to ease integration with a wide variety of processors and operating systems
  • Wide range of ramp up/down timing for slow fade in/out effects and complex repeating patterns
  • Ultra-small package footprint
Part Number Description
KTD2021 3-Channel RGB LED Driver with ExpressWire Control
KTD2022 3-Channel RGB LED Driver with ExpressWire Control
KTD2023 4-Channel RGBW LED Driver with ExpressWire Control
KTD2026 3-Channel RGB LED Driver with I2C Control
KTD2027 4-Channel RGBW LED Driver with I2C Control
KTD2037 3-Channel RGB LED Driver with I2C Control, AutoBlinQ™

USB Data Line Protection ICs

Part Number Description
KTU1000 USB Hi-Speed Switch with Fault Protection
KTU1001 USB D+/D- Hi-Speed or SBU1/2 Switch with Fault Protection
KTU1001A USB D+/D- Hi-Speed or SBU1/2 Switch with Fault Protection
KTU1101 USB Type-C Port Protector for CC and SBU Pins