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| 型號： | VLA500K-01R |
| 廠商： | POWEREX INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, SMA21 |
| 封裝： | SIP-21/30 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 288K |
| 代理商： | VLA500K-01R |
VLA500K-01R
Hybrid IC IGBT Gate Driver +
DC/DC Converter
Powerex, Inc., 200 E. Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
5
Rev. 5/07
General Description
The VLA500K-01R is a hybrid integrated circuit designed
to provide gate drive for high power IGBT modules. This
circuit has been optimized for use with Powerex NF-
Series and A-Series IGBT modules. However, the
output characteristics are compatible with most MOS
gated power devices. The VLA500K-01R features a com-
pact single-in-line package design. The upright mount-
ing minimizes required printed circuit board space to
allow efficient and flexible layout. The VLA500K-01R
converts logic level control signals into fully isolated
+15V/-8V gate drive with up to 12A of peak drive current.
Isolated drive power is provided by a built in DC-to-DC
converter and control signal isolation is provided by an
integrated high speed opto-coupler. Short circuit protec-
tion is provided by means of destauration detection.
Short Circuit Protection
Figure 1 shows a block diagram of a typical desatura-
tion detector. In this circuit, a high voltage fast recovery
diode (D1) is connected to the IGBT’s collector to moni-
tor the collector to emitter voltage. When the IGBT is in
the off state, VCE is high and D1 is reverse biased. With
D1 off the (+) input of the comparator is pulled up to
the positive gate drive power supply (V+) which is nor-
mally +15V. When the IGBT turns on, the comparators
(+) input is pulled down by D1 to the IGBT’s VCE(sat).
The (-) input of the comparator is supplied with a fixed
voltage (Vtrip). During a normal on-state condition the
comparator’s (+) input will be less than Vtrip and it’s out-
put will be low. During a normal off-state condition the
comparator’s (+) input will be larger than Vtrip and it’s out-
put will be high. If the IGBT turns on into a short circuit,
the high current will cause the IGBT’s collector-emitter
voltage to rise above Vtrip even though the gate of the
IGBT is being driven on. This abnormal presence of
high VCE when the IGBT is supposed to be on is often
called
desaturation. Desaturation can be detected by
a logical AND of the driver’s input signal and the com-
parator output. When the output of the AND goes high
a short circuit is indicated. The output of the AND can
be used to command the IGBT to shut down in order
to protect it from the short circuit. A delay (ttrip) must be
provided after the comparator output to allow for the nor-
mal turn on time of the IGBT. The ttrip delay is set so
that the IGBT's VCE has enough time to fall below Vtrip
during normal turn on switching. If ttrip is set too short,
erroneous desaturation detection will occur. The maxi-
mum allowable ttrip delay is limited by the IGBT’s short
circuit withstanding capability. In typical applications
using Powerex IGBT modules the recommended limit is
10s.
Operation of the VLA500K-01R
Desaturation Detector
The Powerex VLA500K-01R incorporates short circuit
protection using desaturation detection as described
above. A flow chart for the logical operation of the short-
circuit protection is shown in Figure 2. When a desatura-
tion is detected the hybrid gate driver performs a soft
shutdown of the IGBT and starts a timed (ttimer) 1.5ms
lock out. The soft turn-off helps to limit the transient
voltage that may be generated while interrupting the
large short circuit current flowing in the IGBT. During the
lock out the driver pulls Pin 28 low to indicate the fault
status. Normal operation of the driver will resume after
the lock-out time has expired and the control input signal
returns to its off state.
Adjustment of Trip Time
The VLA500K-01R has a default short-circuit detection
time delay (ttrip) of approximately 3s. This will prevent
erroneous detection of short-circuit conditions as long
as the series gate resistance (RG) is near the mini-
mum recommended value for the module being used.
The 3s delay is appropriate for most applications so
adjustment will not be necessary. However, in some low
frequency applications it may be desirable to use a
GATE
DRIVE
IGBT
MODULE
AND
INPUT
V+
D1
Vtrip
C
E
G
E
RG
DELAY
ttrip
COMPARE
SHUTDOWN
+
Figure 1. Desaturation Detector
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VLA502-01 | 功能描述:IC IGBT GATE DVR/DC-DC CONV 12A RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關 系列:- 標準包裝:95 系列:- 配置:半橋 輸入類型:PWM 延遲時間:25ns 電流 - 峰:1.6A 配置數(shù):1 輸出數(shù):2 高端電壓 - 最大（自引導啟動）:118V 電源電壓:9 V ~ 14 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOIC 包裝:管件 產(chǎn)品目錄頁面:1282 (CN2011-ZH PDF) 其它名稱:*LM5104M*LM5104M/NOPBLM5104M |
| VLA502-01R | 制造商:ISAHAYA 制造商全稱:Isahaya Electronics Corporation 功能描述:Universal Gate Drive Prototype Board |
| VLA503 | 制造商:POWEREX 制造商全稱:Powerex Power Semiconductors 功能描述:Hybrid IC IGBT Gate Driver |
| VLA503-01 | 功能描述:IC IGBT GATE DRIVER INV/AC SERVO RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關 系列:- 標準包裝:5 系列:- 配置:低端 輸入類型:非反相 延遲時間:600ns 電流 - 峰:12A 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導啟動）:- 電源電壓:14.2 V ~ 15.8 V 工作溫度:-20°C ~ 60°C 安裝類型:通孔 封裝/外殼:21-SIP 模塊 供應商設備封裝:模塊 包裝:散裝 配用:BG2A-NF-ND - KIT DEV BOARD FOR IGBT 其它名稱:835-1063 |
| VLA503-01R | 制造商:ISAHAYA 制造商全稱:Isahaya Electronics Corporation 功能描述:DRIVER FOR IGBT MODULES |
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