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 |
| KTB8330 | 3A, 2.4MHz, Low-Voltage, I2C Programmable Buck Regulator |
| KTB8371 | 4.7V to 17V Input, 5A Synchronous Buck Regulator with I2C Interface |
| KTB851 | 600mA Step-down Converter with Output Load Discharge |
| KTC2110 | 3.0Mhz High Efficiency, Low IQ Synchronous Boost Converter |
| KTC2110A | 3.0MHz High Efficiency Low IQ Synchronous Boost |
| KTZ8701 | 6-Channel PMIC with 2 Buck Converters and 4 LDOs |
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 |
| 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 |
| KTD2801B | Step-Up LED Driver with Internal Diode and ExpressWire/PWM Dimming |
| 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 |
| 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 |
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 |
Overvoltage and Surge Protection ICs
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 |
| 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 |
| KTS1650B | 4.5 Amp Overvoltage Protection IC with Surge Protection |
| KTS1656 | Surge Protected, Single Input, Dual Output Load Switch Protection with OVP |
| KTS1662 | Adjustable Overvoltage Protection Switch |
| KTS1663 | Load Switch with fixed and adjustable OVP |
| KTS1668 | 100V Surge Protected OVP Switch, with sense output |
| KTS1670 | Adjustable Over-Voltage Protection Switch |
| KTS1671 | Load Switch with fixed and adjustable OVP |
| KTS1675 | Overvoltage Protector with Bidirectional Blocking and Surge Protection |
| KTS1676 | Over-voltage Protector with Bidirectional Blocking and Surge Protection |
| KTS1677A | Low RON Load Switch with Overvoltage and Reverse Blocking Protection |
| KTS1678C | Surge Protected, Single Input, Dual Output Load Switch with OVP |
| 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 |
| KTS1680A | 100V Surge Protected OVP Switch |
| KTS1680C | 100V Surge Protected OVP Switch |
| KTS1681 | Ultra-Fast 100V Surge Protected OVP Switch, with VDET output and MIC function |
| KTS1681A | 4 Amp Overvoltage Protection IC with Sense Output |
| KTS1682 | Ultra-Fast 100V Surge Protected OVP Switch, with VDET output and MIC function |
| KTS1686 | Ultra-Fast 100V Surge Protected OVP Switch, with Bidirectional Blocking |
| KTS1688 | OVP Switch with Reverse Blocking and Current Limiting |
| KTS1690A | USB VBUS ISOURCE Load Switch with Current Limit Control |
| KTS1693 | 110V Surge Protected OVP Load Switch with OCP |
| KTS1696A | 7ARMS VBUS Current-Sink Protection Load Switch |
PoE PD Controllers
| Part Number | Description |
| KTA1140 | IEEE 802.3bt-Compliant, Powered Device Interface Controller |
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
- I2C 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 |
| 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™ |
| KTD2041 | 9-Channel IR LED Driver with Buck Regulator and I2C Interface |
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 |
| KTU1108 | USB Type-C Protector for CC Pins |
| KTU1120 | USB Type-C Port Protector for CC and SBU Pins |
| KTU1121A | USB Type-C Port Protector for CC and SBU Pins |
| KTU1121 | USB Type-C Port Protector for CC and SBU Pins |
| KTU1131 | USB Type-C Port Protector for CC, SBU and D+/- Pins |