LED Drive

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Schematic

Features BP9022 / 3132

  • BP9022 is upgradtion of BP3108, Rcs = 1.5R (not 30R), Ip_pk (primary peak current) = 400/30R = 13.3mA, Iout = 13.3/4 * Np/Ns
  • Our Board Max CV current is 320mA, the bigger Rcs pin1 resistor, the smaller CV output current
  • BP9022 output current precision -+6%
  •  BP3132 is a 1A / 650V high voltage MOS integrated primary control LED constant current driver IC. Package type SOP8.

BP3132 can be simply understood as:

  •     1) is an improved version of BP3122 to improve the accuracy of constant current, the output current accuracy of ± 4%.
  •     2) with advanced dynamic temperature control technology to improve power supply reliability.
  •     3) and has an external resistor to precisely set the output over-voltage protection voltage to reduce the output capacitor cost.
  •     4) The output current regulation is insensitive to the transformer inductance.
  •     The BP9022 and BP3132 are Pin to Pin products. Is a low cost version of the BP3132. The main difference is in order
  • For better cost, the output current accuracy is reduced to ± 6% while the internal MOS is changed from 15 ohms to 16 ohms.
  •     BP9022 and BP3132 products The main selling points:
  • 1, the industry's first dual-winding transformer technology, no auxiliary power supply circuit, a high cost.
  • 2, with a transformer can adapt to different output current, reducing the type of transformer.
  • 3, built-in dynamic temperature control technology. In a comprehensive guarantee product reliability under the premise of ensuring maximum output power products.
  • 4, built-in line voltage compensation, higher constant current accuracy and mass production consistency. (Resolved in the past BP3122, different output current needs to be adjusted
  •    Different transformers to ensure the accuracy of constant current problem. )
  • 5, through an external resistor to set the output open-circuit voltage, to ensure the consistency of the batch, reducing the cost of the output capacitor. (To solve the past BP3122,
  •    It is necessary to modify the transformer to be able to achieve the output open-circuit voltage adjustment. )
  • Second, the application:
  •    In the full voltage input Vin = 85V-265V, can output 5W.
  •    In the high-voltage input Vin = 176V-265V, can output 7W

XL6003/XL6005

XL6003

  • Series connection of 12pcs of 1W LED
  • XL6003 is a break through the traditional circuit topology, combined with HVBCD process, high current, high voltage DC / DC step-constant constant current LED driver IC,
  • (1) It has a wide DC 3.6V to 36V input voltage range (low voltage can take into account the lithium power supply)
  • (2) the highest boost to 42V, can drive 12 1W LED series (year on year other brands more drive 4 to 5 LED)
  • (3) high current 1050mA continuous current output, can drive 1W LED12 string 3 or 3W LED12 string
  • (4) EN pin can achieve PWM dimming, and comes with soft-start function
  • (5) as low as 0.2V reference voltage, can effectively improve system efficiency
  • (6) Output 42V overvoltage protection function
  • (7) built-in thermal protection
  • Advantages: wide voltage input, high current output, the external circuit is simple. The XL6003 is a simple, common DC / DC step-up topology with up to 92% efficiency for LED-based automotive, street, solar and LED backlighting applications Low-voltage LED spotlights replace halogen lamps Automotive LED lights Low-voltage industrial lighting LEDs Standby Light LED Lighting Safe Voltage Lighting LCD TV Backlight.
  • 1. The traditional high-power LED street lamp power supply, most of the 220V AC ~ DC behind and then LM358 or transistor to do constant current, the circuit constant current accuracy is low, and over-temperature protection, short circuit protection, output variability Not strong.
  • 2. XL6003 as long as the front has a standard AC ~ DC power supply, 24V / 12V, XL6003 maximum output power of 40W, 80W street with two XL6003 circuit, 120W street with three XL6003 circuit, 200W street with five XL6003 circuit .
  • 3. XL6003 up to 12 LED lights in series, the market other highest output only 8 LED lights in series.
  • 4. Can also be used in solar lights, car taillights, LED white array, high-power flashlight, LED backlight driver
  • VIN = 5V maximum can be lit eight 1W LED. VIN = 6V Up to nine 1W LEDs can be lit up.
  • VIN = 7V Up to 11 1W LEDs can be lit up. VIN> = 8V can be lit up to 12 1W LED.

XL6005

Series connection of 16 pcs of 1W LED:

  • XL6005 is a break through the traditional circuit topology, combined with HVBCD process, high current, high voltage DC / DC step-constant constant current LED driver IC,
  • (1) It has a wide DC 3.6V to 50V input voltage range (low voltage can take into account the lithium power supply)
  • (2) the highest boost to 52V, can drive 16 in series 1W LED (year on year other brands more drive 4 to 5 LED)
  • (3) high current 1750mA continuous current output, can drive 1W LED16 string 3 or 3W LED16 string
  • (4) EN pin can achieve PWM dimming, and comes with soft-start function
  • (5) as low as 0.2V reference voltage, can effectively improve system efficiency
  • (6) Output 52V overvoltage protection function
  • (7) built-in thermal protection
  • Advantages: wide voltage input, high current output, the external circuit is simple. The XL6005 is a simple, common DC / DC step-up topology with up to 95% efficiency for LED-based automotive, street, solar and LED backlighting applications Low-voltage LED spotlights replace halogen lamps Automotive LED lights Low-voltage industrial lighting LEDs Standby Light LED Lighting Safe Voltage Lighting LCD TV Backlight.

PT4115

  • PT4115, current setup is
parrel resistors of two 0.4 R Rp1 = 1/(1/0.4R+1/0.4R) = 0.2R
parral resistors cominbine of Rp1 and 0.5R Rp2 = 1/ (1/Rp1 + 1/0.5R) = 1 / (5+2) = 0.143R
Icur = 0.1 / 0.143R = 700MA
  • More setup
R1 R2 R3 R current
0.4 0.4 0.5 0.143R 700mA
X 0.4 0.5 0.222R 450mA
0.4 0.4 X 0.2R 500mA

Resistor setup for our board

  • Icurrent = 0.1/Rcs
R1 ohm R2 ohm R3 ohm Total resistor ohm current supply
0.33 0.33 or 0.5 0.5 0.124 ohm 800 / 700 mA (default)
0.33 NC remove 0.5 0.199 ohm 500mA
0.33 NC remove NC remove 0.303 ohm 300mA
NC remove NC remove 0.5 0.5 ohm 200mA
R1 ohm R2 ohm R3 ohm Total resistor ohm current supply
0.2 0.5 1 0.125 800mA (default)
0.2 0.5 - 0.143 ohm 700mA
0.2 - 1 0.167 ohm 600mA
0.2 - - 0.2 ohm 500mA
- 0.5 1 0.333 ohm 300mA

Compare

Mode Type Feature Spec
CN5611 LDO Low-Dropout High-Power LED Driver 2.7V to 6V, 800mA
CL6807 AC/DC 6V to 35V 1A LED driver with internal switch 35V / 1A
XL7005 DC-DC 0.5A 200KHz 65V Buck DC to DC Converter -
BP9022 AC85-265V 高精度 PSR LED 恒流驱动芯片 -
MT7834A AC/DC Non-isolated APFC BUCK LED Driver -
BP9918A/BP9918B/BP9918C AC/DC 24V 50V 110V etc 1-3, 3-5, 5-9, 9-18W, 5-9, 8-18 serial LEDs
PT4205 AC/DC 30V/1.2A/高调光比 LED 恒流驱动器 5-30V, 1.2A
PT4115 AC/DC 30V, 1.2A Step-down High Brightness LED Driver with 5000:1 Dimming 6-30V, 1.2A
AL8805 AC/DC HIGH EFFICIENCY 36V 1A BUCK LED DRIVER 6-36V, 1A

Documents

BP9022

XL6003

PT4115

Application

Constant current value adjustment CC

  • Directly short connect with the pens of multimeter
  • Adjust the poteniometer on the left,clockwise turn to bigger and vice verse
  • Now the constant current can be read from multimeter

The regulation of the constant value CV

  • Leave out the load
  • Connect the output terminal to the output voltage with a multimeter
  • adjust potentiometers on the right, clockwise to increase and vice verse
  • the constant voltage value in this case can be read from multimeter directly