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GR8837HのメーカーはGrenergyです、この部品の機能は「Green-Mode PWM Controller」です。 |
部品番号 | GR8837H |
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部品説明 | Green-Mode PWM Controller | ||
メーカ | Grenergy | ||
ロゴ | |||
このページの下部にプレビューとGR8837Hダウンロード(pdfファイル)リンクがあります。 Total 13 pages
Preliminary GR8837H
Green-Mode PWM Controller with Hiccup Protection
Features
Current mode control
Standby power below 100mW
Under-voltage lockout (UVLO)
Non-audible-noise green-mode control
100KHz switching frequency
Internal leading-edge blanking
Internal slope compensation
Internal soft start
Gate output voltage clamp
Jitter and soft driving for reducing EMI
External OVP latch mode
External OTP latch mode
Over-load protection (OLP)-Auto recovery
Mode
Vcc OVP protection- Auto recovery Mode
300mA driving capability
Description
The GR8837H is a highly-integrated, low startup
current, current mode PWM controller with
green-mode function. The integrated functions also
include the leading-edge blanking of the current
sensing, internal slope compensation, soft start
OLP, and OCP. Besides, The RTL pin latch function
by injecting a high over 3.5V to provide OVP latch
off and low below 1V to provide OTP latch off
protection. These functions enable the power supply
to easily meet even the strictest power
requirements.
The GR8837H improves the performance and
reduces the cost of power supplies. It is 6-pin
SOT-26 package.
Application
Switching AC/DC Adapter
Battery Charger
Open frame SMPS
Ordering and Marking Information
SOT-26
Code 1 8 9 A B
GH
IJ
Year 2008 2009 2010 2011
2016
●●●
Code 2 1 2 3 4
9
2017
A
2018 2019
BC
Month Jan. Feb. Mar. Apr.
Sep. Oct. Nov. Dec.
Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
2011.04 Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
1 Page Preliminary GR8837H
Electrical Characteristics (VCC = 15.0V & TA = +25℃,unless otherwise specified.)
Parameter
Pin Min. Typ. Max.
SUPPLY VOLTAGE
Startup current (VCC=UVLO on - 1V)
5 8 15
Operating current (with 1nF load on OUT pin), Vcomp = 0V
5
800
Operating current (with 1nF load on OUT pin), Vcomp = 2.5V 5 2.3 3.3 4.3
UVLO(off)
5 5.8 6.8 7.8
UVLO(on)
5 10.3 11.3 12.3
OVP level on VCC pin-Auto recovery Mode
5 27 28 29
VCC level in Latch off mode (3Meg start-up resistor)
5
6
Holding current at latch off mode (VCC=5V)
20
Latch off mode release voltage
5 3.2
VOLTAGE FEEDBACK
Short circuit current, Vcomp = 0V
2 0.8
Open loop voltage, COMP pin open
2 4.4
5.5
Green-mode start voltage
2 1.5
Burst mode start voltage
2 0.85
CURRENT SENSING
Maximum input voltage, Vcs(off)-Auto recovery Mode
4 0.80 0.85 0.9
Leading-edge blanking time
4 350
Input impedance
41
Delay to Output
4 100
OSCILLATOR
Frequency
- 95
100 105
Jitter frequency
- +6
Green mode frequency
- 28 33 38
Temp. stability (-40°C ~ 110°C)
-5
Voltage stability (VCC = 11V~25V)
-3
GATE DRIVER OUTPUT
Output low level, VCC = 15V, Io = 20mA 6 1
Output high level, VCC = 15V, Io = 20mA
68
Rising time, load capacitance = 1000pF
6 200
Falling time, load capacitance = 1000pF
6 80
VGATE-clamp (VCC = 25V )
6 12
13
OLP SECTION
OLP trip level, Vcomp (OLP)
- 3.5
OLP delay time
- 39
Unit
uA
uA
mA
V
V
V
V
uA
V
mA
V
V
V
V
nS
MΩ
nS
KHz
%
KHz
%
%
V
V
nS
nS
V
V
mS
2011.04 Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
3
3Pages Preliminary GR8837H
2011.04 Ver. A Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
6
6 Page | |||
ページ | 合計 : 13 ページ | ||
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PDF ダウンロード | [ GR8837H 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 |
GR8837 | Green-Mode PWM Controller | Grenergy |
GR8837A | Green-Mode PWM Controller | Grenergy |
GR8837B | Green-Mode PWM Controller | Grenergy |
GR8837C | Green-Mode PWM Controller | Grenergy |