IP Cameras are used in a diverse range of electronic systems and range from a simple single-view camera, to PTZ cameras with IR lighting and occasionally heating elements. Such systems require a broad array of power management solutions including PoE controllers, EMI/ESD protection, LED drivers, Buck and boost voltage regulators, over-voltage, surge protection and load switches.
Buck and Boost Converters
PoE controllers used in IP cameras don’t always provide the specific, required voltage levels for a given application circuit. Buck and boost converters regulators allow the PoE supplied voltage rail to be stepped up or down efficiently, at the point of load for specific application circuits.
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.
PoE powered IP camera products can benefit from integrated ESD and Common Mode EMI suppression IC used to improve EMC performance. Kinetic Technologies’ EMI/ESD Suppression technology is the industry’s first and is used to improve EMC performance in Ethernet applications. What used to present as a design challenge is solved by this unique solution that offers EMC compliance for Ethernet connected devices. The physical interface of the PD data path to the outside environment is through the PHY. The PHY is also subject to ESD and surge events when an Ethernet cable is inserted. CM emissions are typically filtered by large passive devices located between the PHY and the LAN isolation magnetics. Kinetic Technologies offers the world’s first active ESD and EMI suppressor IC, a 4-channel device in which each channel connects to one wire of the two twisted pair sets. ESD performance, EFT-B and surge immunity, and CM emissions equal or exceed passive techniques while occupying a much smaller footprint.
The Kinetic Technologies EMI/ESD Suppression technology enables system designers to comply with:
CISPR22 and FCC Part 15, Class B requirements for Radiated and Conducted Emissions
IEC 61000-4-3/6 requirements for Radiated and Conducted Immunity, Level 3 or higher
Quad Channel Active EMI & ESD Suppressor for Ethernet Applications
LCD Backlight LED Drivers
IP cameras use long series strings or shorter series/parallel strings of infrared(IR) LEDs for low light illumination. IR LED strings often require a higher voltage supply than is available and need LED brightness control. LED drivers provide a high efficiency voltage boost function along with forward current control for brightness dimming.
LED driver power management solutions provide high efficiency voltage conversion for LED strings and brightness control
LED driver solutions can drive IR LEDs, ranging from simple linear LED brightness control to sophisticated high efficiency LED array drivers to cover most IP camera IR LED lighting requirements.
Programming options cover simple PWM signal control to full-featured I2C interfaces.
High Efficiency, Wide Voltage Range 30-LED RGB Driver
Overvoltage and Surge Protection ICs
IP cameras with the ability to be powered from both the ethernet line or an AC-DC adapter require protection against faulty adapters or surge voltages. Kinetic’ superior range of surge protected over-voltage switches can provide this protection. To meet standby power requirements internal voltage rail switching to enable/disable specific circuit function while the device is operating is required. Integrated load switches from Kinetic Technologies provide internal power switching, which is directly controlled by microcontroller logic.
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.
Programmable and fixed over-voltage protection (OVP) shutdown thresholds.
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.
PoE driven IP cameras need high efficiency power conversion, small PCB area and reduced component count. Kinetic Technologies offers a broad portfolio of product solutions, which integrate the PD physical interface and DC/DC controller functions into a single package. Supporting IP camera solutions from a few watts up to the maximum allowed.
The AS11xx family of parts provide solutions for PD controller and integrated primary DC/DC controller with single output isolated or non-isolated solutions for IEEE802.3af (Type 1) and IEEE802.3at (Type 1 and Type 2) PDs. Higher power levels may be achieved using custom programmed PSEs or by implementing the LLDP software interface to enable 4-pair power delivery on the Ethernet cable. These highly integrated solutions provide industry leading performance in a small footprint with integration of front end rectification (AS1113 and AS1114), surge protection, advanced PoE and power management, enabling a flexible design.
The AS1113 and AS1114 PoE + DC/DC controller products address Type 1 PD applications. They are highly integrated CMOS solutions for PoE applications that provide seamless integration of Front End Rectification, Advanced Power Management, EMI Control and High Voltage Protection in the Industry’s smallest footprint.
The AS1138 targets both Type 1 and Type 2 PDs. It is a highly integrated CMOS solution for PoE PDs requiring input power up to 30 watts. The AS1138 integrates input Surge Protection, a digital PD controller, and a low-emission DC/DC controller onto a single die. The AS1138 implements the physical layer PD functionality as required by IEEE® 802.3af and IEEE® 802.3at. This includes 2-event classification, a Type 2 PSE detection indicator (ATDET) in addition to PD detection, under-voltage lockout, and hot-swap FET integration.
13W/30W 802.3af/at PoE PD and Integrated DC-DC Controller
RGB LED Drivers
IP cameras use multicolor RGB LEDs for indicator lamps. Indicator lamps show power on/off or function status. Implementing indicator lamp LED control circuits to interface LED control switching to microcontroller logic is a tedious design process and requires multiple discrete components.
RGB LED drivers allow simplified programmable control of LED color and brightness
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