Driver archives - Page 104 of 273

Description

BP9022 is a high precision primary side feedback constant current LED driver chips. Chip inductor current in discontinuous mode for 85Vac ~ 265Vac full range of input voltage, power 5W or less anti-Excited isolated LED constant current power supply. BP9022 chip integrated 650V power switch, use the primary.

The feeding mode, without secondary feedback circuitry, and without compensation circuitry. It requires minimal external components to achieve excellent constant current characteristic. Collection With a patented drive and current detection methods, chip operating current pole Low, no transformer auxiliary winding detection and power supply, further reducing External components, greatly saving system cost and size.

BP9022 chip inside with high-precision current sampling circuit, while mining With the patented constant current control technology, can achieve high-precision LED Constant Stream output and excellent line voltage regulation. By adjusting the external resistor LED open-circuit voltage can be precisely controlled.

Features

1. Internal integrated 650V power MOSFET
2. PSR constant current control without secondary feedback circuitry
3. No transformer auxiliary winding detection and power supply
4. LED open-circuit voltage can be adjusted by external resistor
5. The chip ultra low operating current

Part Number: MAX7219, MAX7219CNG

Function : Serially Interfaced / 8-Digit LED Display Drivers

Package: 24 Pin ( DIP, SO, CERDIP )

Manufacturer: Maxim

Image

Description

The MAX7219 / MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (μPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8×8 static RAM that stores each digit. Only one external resistor is required to set the segment current for all LEDs. The MAX7221 is compatible with SPI, QSPI, and MICROWIRE, and has slewrate-limited segment drivers to reduce EMI.

Pinout

Features

1. 10MHz Serial Interface
2. Individual LED Segment Control
3. Decode/No-Decode Digit Selection
4. 150μA Low-Power Shutdown (Data Retained)
5. Digital and Analog Brightness Control
6. Display Blanked on Power-Up
7. Drive Common-Cathode LED Display
8. Slew-Rate Limited Segment Drivers for Lower EMI (MAX7221)
9. SPI, QSPI, MICROWIRE Serial Interface (MAX7221)

Typical Application Circuit

Reference Site