Microchip MIC2874 Bruksanvisning
Microchip
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MIC2874
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2018 Microchip Technology Inc. DS20006081A-page 1
MIC2874
Features
• Up to 1.2A Flash LED Driving Current
• Highly Efficient Synchronous Boost Driver
• Control through Single-Wire Serial Interface or
External Control Pin
• Input Voltage Range: 2.7V to 5.5V
• True Load Disconnect
• Configurable Safety Time-Out Protection
• Output Overvoltage Protection (OVP)
• LED Short Detection and Protection
• 1 µA Shutdown Current
• Available in 9-Bump 1.30 mm x 1.30 mm WLCSP
Package
Applications
• Camera Phones/Mobile Handsets
• Cell Phones/Smartphones
• LED Light for Image Capture/Auto-Focus/
White Balance
• Handset Video Light (Torch Light)
• Digital Cameras
• Portable Applications
General Description
The MIC2874 is a high-current, high-efficiency Flash
LED driver. The LED driver current is generated by an
integrated inductive boost converter with a 4 MHz switch-
ing frequency, which allows for the use of a very small
inductor and output capacitor. These features make the
MIC2874 an ideal solution for high-resolution camera
phone LED Flash light driver applications.
MIC2874 operates in either Flash or Torch mode that can
be controlled through the single-wire serial interface
and/or external control pin. A robust single-wire serial
interface allows the host processor to control the LED
current and brightness. The MIC2874 is available in a
9-bump 1.30 mm x 1.30 mm WLCSP package.
1.2A High-Brightness Flash LED Driver with
Single-Wire Serial Interface
MIC2874
DS20006081A-page 2 2018 Microchip Technology Inc.
Package Type
Typical Application Schematic
LED
A
B
C
DC OUT
LGND SWFEN
AGND V
IN
PGND
1 2 3
MIC2874
9-Bump 1.30 mm x 1.30 mm WLCSP (CS)
(Top View)
Note: WLCSP Bump A1 identifier = “•”.
DC
LED
FEN
VIN SW OUT
V
BAT
AGND
FLASH ENABLE
SINGLE-WIRE SERIAL I/F
PGND
LGND
2018 Microchip Technology Inc. DS20006081A-page 3
MIC2874
Functional Block Diagram
SW
SYSTEM
CONTROL
LOGIC +
ANTI-CROSS
CONDUCTION
DC
FEN
VIN
AGND
LED
OUT
PGND
LGND
SINGLE-
WIRE
SERIAL
INTERFACE
LED SCP
UVLO
BODY
SWITCH
OTP
155°C/
140°C
LBVD
SAFETY
TIMER
DIE TEMP
2.53V/
2.35V
OUT
LED 1.7V
VIN
AGND
PGND
Z Z
4 MHz
OSCILLATOR
V/I
OUT
SAFETY
TIMER
SAFETY
TIMER
DECODER
4-BIT
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | MIC2874 |
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