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RT8509AのメーカーはRichtekです、この部品の機能は「Step-Up DC/DC Converter」です。 |
部品番号 | RT8509A |
| |
部品説明 | Step-Up DC/DC Converter | ||
メーカ | Richtek | ||
ロゴ | |||
このページの下部にプレビューとRT8509Aダウンロード(pdfファイル)リンクがあります。 Total 12 pages
®
RT8509A
4.5A Step-Up DC/DC Converter
General Description
The RT8509A is a high performance switching Boost
converter that provides a regulated supply voltage for active
matrix thin film transistor (TFT) liquid crystal displays
(LCDs).
The RT8509A incorporates current mode, fixed-frequency,
pulse width modulation (PWM) circuitry with a built in
N-MOSFET to achieve high efficiency and fast transient
response.
The RT8509A has a wide input voltage range from 2.8V to
14V. In addition, the output voltage can be adjusted up to
24V via an external resistive voltage divider. The maximum
peak current is limited to 4.5A (min.). Other features
include adjustable soft-start, over-voltage protection, and
over-temperature protection.
The RT8509A is available in the WDFN-12L 5x5 package.
Marking Information
RT8509A
GQW
YMDNN
RT8509AGQW : Product Number
YMDNN : Date Code
Features
90% Efficiency
Adjustable Output Up to 24V
2.8V to 14V Input Supply Voltage
Input Supply Under-Voltage Lockout
Fixed 1.2MHz Switching Frequency
Adjustable Soft-Start
VOUT Over-Voltage Protection
Over-Temperature Protection
Thin 12-Lead WDFN Package
RoHS Compliant and Halogen Free
Applications
GIP TFT-LCD Panels
Ordering Information
RT8509A
Package Type
QW : WDFN-12L 5x5 (W-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
L1 D1
VIN
VOUT
CIN R4
LX
VIN VOUT
C2
RT8509A
FB
R1
C3
R2
COUT
Enable
EN
GND
SS
COMP
R3
CSS
C1
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8509A-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 Page Function Block Diagram
VIN
EN
COMP
FB
VOUT
OVP
LX
OTP
Protection
Soft
Start
Error Amplifier
+
1.25V -
VDD
Summing
Comparator
-
+
Clock
Control
and
Driver
Logic
Oscillator
Slope
Compensation
Current
Sense
Operation
The RT8509A is a high-performance step-up DC/DC
converter that provides a regulated and high precision
supply voltage. It incorporates current mode, fixed-
frequency, pulse-width modulation (PWM) circuitry with
a built-in N-Channel power MOSFET to achieve high
efficiency and fast transient response. The device features
an adjustable soft start time using an external soft-start
capacitor to reduce in-rush current.
RT8509A
SS
LX
GND
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8509A-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3
3Pages RT8509A
Typical Application Circuit
L1
VIN
4.7µH
D1
VOUT
12V CIN
10µF x 3 R4
10
7, 8
LX VOUT 10
C3
R1
134k
COUT 18V
10µF x 4
C2 11 VIN RT8509A
1µF
FB 2
1µF
R2
10k
CSS
Enable
3 EN
SS 12
33nF
R3
4, 5, 6, 9,
13 (Exposed Pad)
GND
COMP 1 56k
C1
1nF
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS8509A-00 November 2013
6 Page | |||
ページ | 合計 : 12 ページ | ||
|
PDF ダウンロード | [ RT8509A データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
RT8509 | Step-Up DC/DC Converter | Richtek |
RT8509A | Step-Up DC/DC Converter | Richtek |