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LP5521
MCU
C
OUT
1 PF
C
IN
1 PF
0.47 PF
C
FLY1
C
FLY2
SCL
SDA
CLK_32K
INT
ADDR_SEL0
ADDR_SEL1
TRIG
EN
VDD
GNDs
R
G
B
VOUT
CFLY1P CFLY1N CFLY2P CFLY2N
-
+
RGB LED 0...25.5 mA/LED
GPO
0.47 PF
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LP5521
SNVS441G –JANUARY 2007–REVISED SEPTEMBER 2014
LP5521 Programmable Three-Channel LED Driver
1 Features 3 Description
The LP5521 is a three-channel LED driver designed
1
• Adaptive Charge Pump with 1x and 1.5x Gain
to produce variety of lighting effects for mobile
Provides Up to 95% LED Drive Efficiency
devices. A high-efficiency charge pump enables LED
• Charge Pump with Soft Start and
driving over full Li-Ion battery voltage range. The
Overcurrent/Short Circuit Protection
device has a program memory for creating variety of
lighting sequences. When program memory has been
• Low Input Ripple and EMI
loaded, LP5521 can operate autonomously without
• Very Small Solution Size, No Inductor or Resistors
processor control allowing power savings.
Required
The device maintains excellent efficiency over a wide
• 200 nA Typical Shutdown Current
operating range by automatically selecting proper
• Automatic Power Save Mode
charge pump gain based on LED forward voltage
• I
2
C-Compatible Interface
requirements and is able to automatically enter
power-save mode, when LED outputs are not active
• Independently Programmable Constant Current
and thus lowering current consumption.
Outputs with 8-bit Current Setting and 8-bit PWM
Control
Three independent LED channels have accurate
• Typical LED Output Saturation Voltage 50 mV and
programmable current sources and PWM control.
Each channel has program memory for creating
Current Matching 1%
desired lighting sequences with PWM control.
• Three Program Execution Engines with Flexible
Instruction Set
The LP5521 has a flexible digital interface. Trigger
I/O and 32 kHz clock input allow synchronization
• Autonomous Operation Without External Control
between multiple devices. Interrupt output can be
• Large SRAM Program Memory
used to notify processor, when LED sequence has
• Two General Purpose Digital Outputs
ended. LP5521 has four pin selectable I
2
C-
compatible addresses. This allows connecting up to
• DSBGA-20 Package, 0.4-mm Pitch
four parallel devices in one I
2
C-compatible bus. GPO
• Bumped WQFN-24 Package, 0.5-mm Pitch
and INT pins can be used as a digital control pin for
other devices.
2 Applications
The LP5521 requires only four small and low cost
• Fun / Indicator Lights
ceramic capacitors.
• LCD Sub-Display Backlighting
Comprehensive application tools are available,
• Keypad RGB Backlighting and Phone Cosmetics
including command compiler for easy LED sequence
• Vibra, Speakers, Waveform Generator
programming.
Typical Application Circuit
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
LP5521TM DSBGA (20) 2.066 mm x 1.717 mm
LP5521YQ WQFN (24) 5.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 3 Seite 4
- ・ Abmessungen des Paketumrisses on Seite 42 Seite 44 Seite 45
- ・ Markierungsinformationen on Seite 42
- ・ Blockdiagramm on Seite 6 Seite 11 Seite 12 Seite 13 Seite 36
- ・ Typisches Anwendungsschaltbild on Seite 1 Seite 36 Seite 38
- ・ Technische Daten on Seite 5
- ・ Anwendungsbereich on Seite 1 Seite 36 Seite 48
- ・ Elektrische Spezifikation on Seite 6 Seite 7
