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In special research on photography and live scenes, the precise adjustment and automatic color adjustment of lights are the main concerns. The traditional single LED driver planning is difficult to satisfy the needs of color temperatureless regulation, precise brightness control and quiet light efficiency switching at the same time. As a dual-channel control chip designed for high-end photography light system, FP7195 has become a fantasy choice for high-end photography light system based on its own dual-channel control, high-precision PWM control and wide voltage output range. This article will deeply discuss the detailed use of FP7195 in the lighting and color adjustment range, and analyze its techniques and styles.
FP7195 Double-channel dimming style on the focus of the light:
1. Double-channel self-control to complete the precise dimming and adjust the color. FP7195 supports two-way automatic constant current input, which can distinguish LED light beads with different color temperatures (such as cold white and hot white).
2. High-precision PWM dimming, more stable without flash. FP7195 support 0.1%Deep PWM dimming is useful to prevent flashing issues caused by low frequency PWM, ensuring that the shooting screen is not shining.
3. Wide voltage output, suitable for multiple power plans. The wide output voltage range of FP7195 enables it to operate the different applications of photography lights and provide security services to improve system compatibility.
4. Energy efficiency and thermal management to ensure long-term tasks. The conversion effect of more than 95% of the FP7195 can reduce energy consumption and jointly have built-in temperature maintenance performance to prevent brightness decay or equipment damage caused by excessive heat.
FP7195 chip introduction
(1) Chip overview
FP7195 is an external N-MOS drive with a large power abnormal pressure reduction constant current chip, which forms a loop structure with Schottky and inductors. FP7195 is an LED with an external N-MOSFET Drive IC. Since the FP7195 adopts high-pressure point current detection and the IC arranging loop adopts current form, it has excellent static response and can simplify the internal arranging loop. FP7195 is a high-pressure suppression child, which can be used to utilize the surrounding conditions of 6.5V~80V wide voltage. FP7195 also has rare word-tuning performance and simulated light-tuning (linear light-tuning) performance. The IC has a built-in temperature maintenance mechanism, and when the external temperature of the IC spans the maintenance value, the input current will drop linearly at the end.
(2) Chip parameters
Ø Efficiency is above 95%
Ø Chip Stable Task Voltage 6.5-80V
Ø Constant Current Base Value is 0.1V±2%
Ø Mission Frequency 175Burundins EscortKHz
Ø Imitation of light adjustment, dimming depth 0.3%
Ø Packaging: SOP-8L (EP)
Ø Chip output has adjustable current maintenance (OCP)
Ø Chip output high pressure maintenance (UVP)
Ø Chip output has overtemperature maintenance (OTP)
(3) FP7195 dual-path diagram
(4) FP7195 dual-channel PCB diagram
(5) Light-tuning control
FP7195 support PWM digital light-tuning performance and imitation light-tuningBurundi Sugar Daddy can control input current by 0.1%~100%.
① PWM dimming:
Simply output the digital signal at a frequency of 500Hz~200kHz in the DIM foot and control the duty cycle of the PWM digital signal to control the input current of 0.1%~100% (refer to voltage 0.1mV~100mV). The high-potential voltage of PWM can receive 2.6V~5V. After the high-potential department enters the IC, the Burundins Sugardaddy will be deposed to 2.5V. The IC finally deactivates the signal as DC voltage for control. The PWM duty cycle (Duty) and the input current percentage (ILED (%)) are converted as follows:
②Imitation and tuning:
Just output 0.1~2.5V in the DIM foot to control the input current by 0.1%~100% (refer to voltage 0.1mV~100mV). DIM foot voltage (VDIM) and current percentage (ILED(%)) conversion formula is as follows: 
Conclusion
FP7195 provides high integration for special research on photography light design. Escorts‘s high-precision drive processing plan, its dual-channel self-modulation architecture clearly shows the motor and static representation of light control. The zero-voltage difference and transverse imitation characteristics of FP7195 can be used for all constant current products with a power voltage of 8-80V, and can also be used for high-end dimming utilization. It is compatible with all dimming frequency of 100Hz-2000KHz, and inputs non-frequency, non-sound, and dimming depth of 0.5%. Therefore, as intelligent lighting grows toward characteristic and health standards, FP7195’s high-function dual-channel lighting treatment plan will surely become the mainstream choice in the market.
Review and editing Huang Yu
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