DataSheet26.com

RT8889D PDF даташит

Спецификация RT8889D изготовлена ​​​​«Richtek» и имеет функцию, называемую «3-Phase PWM Controller».

Детали детали

Номер произв RT8889D
Описание 3-Phase PWM Controller
Производители Richtek
логотип Richtek логотип 

30 Pages
scroll

No Preview Available !

RT8889D Даташит, Описание, Даташиты
®
RT8889D
3-Phase PWM Controller with Triple Integrated Drivers for
VR12.5 CPU Core Power Supply
General Description
The RT8889D is a three phase CPU power controller with
triple integrated drivers for VR12.5 compliant. The
RT8889D adopts G-NAVPTM (Green Native AVP) which is
Richtek's proprietary topology derived from finite DC gain
of EA amplifier with current mode control, making it an
easy setting the droop to meet all Intel CPU requirements
of AVP (Adaptive Voltage Positioning). Based on the G-
NAVPTM topology, the RT8889D also features a quick
response mechanism for optimized AVP performance
during load transient. The RT8889D supports mode
transition function with various operating states. A Serial
VID (SVID) interface is built in the RT8889D to
communicate with Intel VR12.5 compliant CPU. The
RT8889D supports VID on-the-fly function with three
different slew rates : Fast, Slow and Decay. By utilizing
the G-NAVPTM topology, the operating frequency of the
RT8889D varies with VID, load current and input voltage
to further enhance the efficiency even in CCM. Besides
G-NAVPTM, the CCRCOT (Constant Current Ripple
Constant On Time) technology provides superior output
voltage ripple over the entire input/output range. The built-
in high accuracy DAC converts the SVID code ranging
from 0.5V to 3.04V with 10mV per step. The RT8889D
integrates a high accuracy ADC for platform setting
functions, such as no-load offset and over current
protection level. It also features complete fault protection
functions including Over Voltage (OV), Under Voltage (UV),
Negative Voltage (NV), Over Current (OC) and Under
Voltage Lockout (UVLO). The RT8889D is available in a
WQFN-40L 5x5 small foot print package.
Features
Intel VR12.5 Serial VID Interface Compatible Power
Management States
3/2/1 Phase PWM Controller with Triple Integrated
Driver
G-NAVPTM Topology
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming
Accurate Current Balance
System Thermal Compensated AVP
Diode Emulation Mode at Light Load Condition for
Single Phase
Fast transient Response
VR Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, UVP, OCP, UVLO
External No-Load Offset Setting
DVID Enhancement
Small 40-Lead WQFN Package
Applications
VR12.5 Intel Core Supply
Notebook/Desktop Computer/Servers Multi-phase CPU
Core Supply
AVP Step-Down Converters
Simplified Application Circuit
To PCH
To CPU
RT8889D
VR_RDY PHASE1
VR_HOT
VCLK
PHASE2
VDIO
ALERT PHASE3
MOSFET
MOSFET
MOSFET
VCORE
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8889D-00 April 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1









No Preview Available !

RT8889D Даташит, Описание, Даташиты
RT8889D
Ordering Information
RT8889D
Package Type
QW : WQFN-40L 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.
Marking Information
RT8889D
GQW
YMDNN
RT8889DGQW : Product Number
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
UGATE2 1
BOOT2 2
30
29
EN 3
28
ISEN2P 4
27
ISEN2N 5
ISEN1N 6
GND
26
25
ISEN1P 7
24
ISEN3P 8
ISEN3N 9
41 23
22
IMON 10
21
11 12 13 14 15 16 17 18 19 20
BOOT3
VR_RDY
TONSET
VCLK
ALERT
VDIO
VR_HOT
TSEN
IBIAS
SET3
WQFN-40L 5x5
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8889D-00 April 2015









No Preview Available !

RT8889D Даташит, Описание, Даташиты
RT8889D
Functional Pin Description
Pin No.
Pin Name
Pin Function
3 EN
VR Enable Control Input.
6, 5, 9
ISEN [1:3] N Negative Current Sense Inputs of Channel 1, 2 and 3.
7, 4, 8
ISEN [1:3] P Positive Current Sense Inputs of Channel 1, 2 and 3.
10 IMON
CPU CORE Current Monitor Output. This pin outputs a voltage proportional to
the output current. Don’t connect a bypass capacitor from this pin to GND or
VREF pin.
11 VREF
Fixed 0.6V Reference Voltage Output. This voltage is only used to offset the
output voltage of IMON pin. Connect a 0.47F decoupling capacitor between
this pin and GND.
12, 13
NC
No Internal Connection.
14 COMP
Compensation Node for VR. This pin is error amplifier output pin.
15 FB
Negative Input of the Error Amplifier. This pin is for output voltage feedback to
controller.
16 VSEN
Voltage Sense Input for VR. This pin is connected to the terminal of VR output
voltage.
17 RGND
Return Ground for VR. This pin is the negative node of the differential remote
voltage sensing.
18 VCC
19 SET1
20 SET2
21 SET3
Power Supply Input for Controller. Connect this pin to a 5V power supply and
place a minimum 2.2F decoupling capacitor. The decoupling capacitor should
be place to PWM controller as close as possible.
1st Platform Setting. Platform can use this pin to set DVID compensation
threshold, RSET, DVID compensation width and OCS.
2nd Platform Setting. Platform can use this pin to set ICCMAX, QRTH and
QRSET.
3rd Platform Setting. Platform can use this to set output offset voltage.
22 IBIAS
Internal Bias Current Setting. Connect a 100kresistor from this pin tied to
GND to set the internal current. Don’t connect a bypass pass capacitor from this
pin to GND.
23 TSEN
Thermal Sense Input for VR.
24
VR_HOT
Thermal Monitor Output. (Active Low)
25 VDIO
VR and CPU Data Transmission Interface.
26 ALERT SVID Alert. (Active low)
27 VCLK
Synchronous Clock Input from the CPU.
28
TONSET
On-time Setting. An on-time setting resistor is connected from this pin to input
voltage.
29
VR_RDY
VR Ready Indicator.
34 PVCC
Driver Power. Connect this pin to GND by a minimum ceramic capacitor.
35, 39, 33 LGATE [1:3] Low Side Drive Output. This pin drives the Gate of low side MOSFET.
36, 40, 32
PHASE [1:3]
Switch Node of High Side Driver. Connect the pin to high side MOSFET source
together with the low side MOSFET Drain and the inductor.
37, 1, 31 UGATE [1:3] High Side Drive Output. Connect the pin to the Gate of high side MOSFET.
38, 2, 30 BOOT [1:3] Bootstrap Supply for High Side Gate Driver.
41
(Exposed Pad)
GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8889D-00 April 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3










Скачать PDF:

[ RT8889D.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
RT8889D3-Phase PWM ControllerRichtek
Richtek

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск