Datasheet.kr   

RT8243C 데이터시트 PDF




Richtek에서 제조한 전자 부품 RT8243C은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 RT8243C 자료 제공

부품번호 RT8243C 기능
기능 Main Power Supply Controller
제조업체 Richtek
로고 Richtek 로고


RT8243C 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 24 페이지수

미리보기를 사용할 수 없습니다

RT8243C 데이터시트, 핀배열, 회로
®
RT8243A/B/C
High Efficiency, Main Power Supply Controller
for Notebook Computers
General Description
The RT8243A/B/C is a dual step down, Switch Mode Power
Supply (SMPS) controller which generates logic supply
voltages for battery powered systems. It includes two
Pulse Width Modulation (PWM) controllers adjustable
from 2V to 5.5V and also two fixed 5V/3.3V linear
regulators. One of the controllers (LDO5) provides
automatic switch over to the BYP1 input connected to
the main SMPS1 output for maximized efficiency. An
optional external charge pump can be monitored through
SECFB (RT8243B/C). Other features include on board
power up sequencing, a power good output, internal soft-
start, and a soft discharge output that prevents negative
voltage during shutdown.
A constant on-time PWM control scheme operates without
sense resistors and assures fast load transient response
while maintaining nearly constant switching frequency. To
eliminate noise in audio applications, an ultrasonic mode
is included, which maintains the switching frequency
above 25kHz. Moreover, a diode emulation mode
maximizes efficiency for light load applications. The
SMPS1/SMPS2 switching frequency can be adjustable
from 200kHz/233kHz to 400kHz/466kHz respectively.
The RT8243A/B/C is available in a WQFN-20L 3x3
package, and operates over an extended temperature range
from 40°C to 85°C.
Features
5.5V to 25V Input Voltage Range
2V to 5.5V Output Voltage Range
No Current Sense Resistor Needed
5V/3.3V Linear Regulators
4700ppm/°C RDS(ON) Current Sensing
Internal Current Limit Soft-Start and Soft Discharge
Output
Built In OVP/UVP/OCP
Selectable Operation Mode with Switcher Enable
Control (RT8243A)
SECFB Input Maintains Charge Pump Voltage
(RT8243B/C)
Power Good Indicator (RT8243B/C includes SECFB)
RoHS Compliant and Halogen Free
Applications
Notebook computers
System Power Supplies
3- and 4- Cell Li+ Battery-Powered Device
Ordering Information
RT8243A/B/C
Package Type
QW : WQFN-20L 3x3 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Pin Function With
A : ENM
B : SECFB
C : SECFB, Ultrasonic Mode
Note :
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.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8243A/B/C-07 November 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1




RT8243C pdf, 반도체, 판매, 대치품
RT8243A/B/C
VIN
5.5V to 25V
C1
10µF
VOUT1
5V
C3
N1
L1
N2
R3
15k
R4
10k
R1 RT8243B/C
C6
C2
0.1µF
11 VIN
12 ENLDO
UGATE2 8
BOOT2 7
R5
10µF
N3
18 UGATE1
C7
R2
C4
0.1µF
19 BOOT1
17 PHASE1
PHASE2 9
LGATE2 10
0.1µF
L2
VOUT2
3.3V
N4 C8
R6
6.5k
16 LGATE1
FB2 5
RTON
1 FB1
3 TON
ENTRIP2 4
ENTRIP1 2
R8
100k
R9
100k
R7
10k
On
C5
Optional
C13
0.1µF
C11
0.1µF
C12
0.1µF
20 BYP1
C14
0.1µF
R11
200k
C15
VCP
13 SECFB
R12
39k
LDO3 15
C9
4.7µF
LDO5 14
PGOOD 6
R10
100k
GND 21 (Exposed Pad)
Off
3.3V Always On
C10 5V Always On
4.7µF
Figure 2. RT8243B/C NB Main Supply Typical Application Circuit
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
4
is a registered trademark of Richtek Technology Corporation.
DS8243A/B/C-07 November 2014

4페이지










RT8243C 전자부품, 판매, 대치품
RT8243A/B/C
Absolute Maximum Ratings (Note 1)
VIN, ENLDO to GND ------------------------------------------------------------------------------------------------------ 0.3V to 30V
BOOTx to PHASEx
DC ----------------------------------------------------------------------------------------------------------------------------- 0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- 2.5V to 6.3V
ENTRIPx, FBx, TON, BYP1, PGOOD, LDO5, LDO3, ENM/SECFB to GND ------------------------------- 0.3V to 6V
PHASEx to GND
DC ----------------------------------------------------------------------------------------------------------------------------- 0.3V to 30V
< 20ns ----------------------------------------------------------------------------------------------------------------------- 8V to 38V
UGATEx to PHASEx
DC ----------------------------------------------------------------------------------------------------------------------------- 0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- 5V to 7.5V
LGATEx to GND
DC ----------------------------------------------------------------------------------------------------------------------------- 0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- 2.5V to 7.5V
Power Dissipation, PD @ TA = 25°C
WQFN-20L 3x3 ------------------------------------------------------------------------------------------------------------ 3.33W
Package Thermal Resistance (Note 2)
WQFN-20L 3x3, θJA ------------------------------------------------------------------------------------------------------- 30°C/W
WQFN-20L 3x3, θJC ------------------------------------------------------------------------------------------------------ 7.5°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range -------------------------------------------------------------------------------------------- 65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 5.5V to 25V
Junction Temperature Range -------------------------------------------------------------------------------------------- 40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- 40°C to 85°C
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8243A/B/C-07 November 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
7

7페이지


구       성 총 24 페이지수
다운로드[ RT8243C.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
RT8243A

Main Power Supply Controller

Richtek
Richtek
RT8243B

Main Power Supply Controller

Richtek
Richtek

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵