DataSheet.jp

HV300LG-G の電気的特性と機能

HV300LG-GのメーカーはSupertexです、この部品の機能は「Inrush Current Limiter Controllers」です。


製品の詳細 ( Datasheet PDF )

部品番号 HV300LG-G
部品説明 Inrush Current Limiter Controllers
メーカ Supertex
ロゴ Supertex ロゴ 




このページの下部にプレビューとHV300LG-Gダウンロード(pdfファイル)リンクがあります。

Total 7 pages

No Preview Available !

HV300LG-G Datasheet, HV300LG-G PDF,ピン配置, 機能
HV300
Hotswap, Inrush Current Limiter Controllers
(Negative Supply Rail)
Features
PWRGD = Active HIGH
-10V to -90V input voltage range
Few external components
0.33mA typical standby supply current
Programmable over/under voltage limits with
hysteresis
Programmable current limit
Active control during all phases of start-up
Programmable timing
8-Lead SOIC package
Applications
Central office switching
Servers
POTS line cards
ISDN line cards
xDSL line cards
PBX Systems
Powered Ethernet for VoIP
Distributed power systems
Negative power supply control
Antenna and fixed wireless systems
General Description
The Supertex HV300, Hotswap Controller, Negative Supply controls the power
supply connection during insertion of cards or modules into live backplanes.
It may be used in traditional ‘negative 48V’ powered systems or for higher
voltage busses up to negative 90V.
Operation during the initial power up prevents turn-on glitches, and after
complete charging of load capacitors (typically found in filters at the input
of DC-DC converters) the HV300 issues a power good signal. This signal is
typically used to enable the DC-DC converter. Once a PWRGD signal has
been established, the device sleeps in a low power state, important for large
systems with many individual hotswap cards or modules.
An external power MOSFET is required as the pass element, plus a ramp
capacitor, and resistors to establish current limiting and over and under voltage
lockouts. There is no need for additional external snubber components.
Features are programmable over voltage and under voltage detection of the
input voltage which locks out the load connection if the bus (input) voltage
is out of range. An internal voltage regulator creates a stable reference,
and maintains accurate gate drive voltage. The unique control loop scheme
provides full current control and limiting during start up.
Theory of Operation
Initially the external N-channel MOSFET is held off by the gate signal,
preventing an input glitch. After a delay (while internal circuits are activated)
the inrush current to the load is limited by the gate control output. The current
may ramp up and limit at a maximum value programmed by an external
resistor. Initial time delay, to allow for contact bounce, and charging operation
is determined by the single external ramp capacitor connected to the RAMP
pin. When the load capacitor is fully charged, the controller emerges from
current limit mode, an additional time delay occurs before the external N-
channel MOSFET pass transistor is switched to full conduction, and the
PWRGD output signal is activated. The controller will then transition to a low
power standby mode.
Typical Application Circuit
GND
-48V
Long Pin
Jumper
GND
Short Pin
R1
487kΩ
R2
6.81kΩ
R3
9.76kΩ
Long Pin
8
VDD
3 UV
2 OV
RAMP
7
C1
10nF
PWRGD 1
HV300
VEE
4
SENSE GATE
56
R4
50mΩ
Q1
IRF530
ENABLE
+5V
CLOAD
DC/DC
PWM
CONVERTER
COM
NOTES: 1. Undervoltage Shutdown (UV) set to 35V.
2. Overvoltage Shutdown (OV) set to 65V.
3. Remove jumper if short pin is used.
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com

1 Page





HV300LG-G pdf, ピン配列
HV300
Electrical Characteristics (VIN = -10 to -90V, -40°C ≤ TA ≤ +85°C unless otherwise noted)
Sym Parameter
Min Typ Max Units Conditions
Current Limit (Referenced to VEE pin)
VSENSE
Current limit threshold voltage
Gate Drive Output (Referenced to VEE pin)
40 50 60 mV VUV = VEE + 1.9V, VOV = VEE + 0.5V
VGATE Maximum GATE drive voltage
9.0 10 11
V VUV = VEE + 1.9V, VOV = VEE + 0.5V
IGATEUP GATE drive pull-up current
500 - - µA VUV = VEE + 1.9V, VOV = VEE + 0.5V
IGATEDOWN GATE drive pull-down current
40 -
- mA VUV = VEE, VOV = VEE + 0.5V
Timing Control (Test Conditions: C =100µF, CRAMP = 10nF, VUV = VEE +1.9V, VOV = VEE +0.5V, External MOSFET is IRF5303)
IRAMP
tPOR
Ramp pin output current
Time from UV to GATE turn on1
- 10 -
µA VSENSE = 0V
2.0 -
- ms ---
tRISE Time from GATE turn on to VSENSE limit
400 - - µs ---
tLIMIT Duration of current limit mode
- - 5.0 ms ---
tPWRGD Time from current limit to PWRGD
- 5.0 -
VRAMP Voltage on ramp pin in current limit mode2 - 3.6 -
ms ---
V ---
Power Good Output (Referenced to VEE pin)
VPWRGD
Power good pin breakdown voltage
Power good pin output low voltage
Dynamic Characteristics
90 -
-
- 0.5 0.8
V ---
V IPWRGD = 1.0mA
tGATEHLOV OV delay
- - 500 ns ---
tGATEHLUV UV delay
- - 500 ns ---
Notes
1. This timing depends on the threshold voltage of the external N-Channel MOSFET. The higher its threshold is, the longer this timing.
2.
3.
This voltage depends on the characteristics of the external
IRF530 is a registered trademark of International Rectifier.
N-Channel
MOSFET.
VGS(th)
=
3.0V
for
an
IRF530.
PWRGD Logic
Device
Condition
HV300
Not Ready
Ready
PWRGD
0 VEE
1 Hi Z
Waveforms
Drain
50V/div
VIN
50V/div
GATE
5.0V/div
IINRUSH
500mA/div
5.0ms/div
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
3


3Pages


HV300LG-G 電子部品, 半導体
HV300
From the second equation for an over voltage set point of
65V, the value of R3 may be calculated.
OVOFF = 1.26 = 65 • R3 / 500kΩ
R3 = (1.26 • 500K) / 65 = 9.69 kΩ
Undervoltage/Overvoltage Operation
GND
UVOFF
UVON
VIN
The closest 1% value is 9.76kΩ.
From the first equation for an under voltage set point of 35V,
the value R2 can be calculated.
OVON
OVOFF
Pass
Transistor ON
UVOFF = 1.16 = 35 • (R2 + R3) / 500K
R2 = (1.16 • 500K) / 35 – 9.76kΩ = 6.81kΩ.
The closest 1% value is 6.81kΩ.
Then R1 = 500K – (R2 + R3) = 483kΩ
The closest 1% value is 487kΩ.
OFF
Current Limit
The current limit magnitude above which the current will
not be allowed to rise during startup is programmed using a
sense resistor connected from the SENSE pin to VEE pin.
For example to program a current limit of 1.0A, one would
choose a resistor as follows:
RSENSE = 50mV / ISENSE
RSENSE = 50mV / 1.0A
RSENSE = 50mΩ
Pin Description
Pin #
1
2
3
Function
PWRGD
OV
UV
Description
This pin is held low during inrush current limiting and changes to high impedance state when the
external MOSFET is fully turned on. This pin may be used as an enable control when connected
directly to a PWM power module.
This pin, when raised above its high threshold, will immediately cause the GATE pin to be pulled
low. The GATE pin will remain low until the voltage on this pin falls below the low threshold limit,
initiating a new start-up cycle.
This Under Voltage sense pin, when below its low threshold limit will ensure that the GATE pin
is low. The GATE pin will remain low until the voltage on this pin rises above the high threshold,
initializing a new start-up cycle.
4 VEE This pin is the negative voltage power supply input to the circuit.
5 VDD This pin is the positive voltage power supply input to the circuit.
This pin provides a current output so that a timing ramp voltage is generated when a capacitor is
connected. The initial portion of the ramp provides a time delay, which in conjunction with the Un-
6 RAMP der Voltage detection circuit eliminates circuit card insertion contact bounce. The RAMP pin also
controls the delay between the current limit mode disengaging and the PWRGD signal activating;
as well as the current rise profile after the initial turn on delay.
7 GATE This is the GATE driver output for the external N-Channel MOSFET.
8
SENSE
The current sense resistor connected from this pin to VEE pin programs the current limit. Constant
current output mode is established when the voltage drop across this resistor reaches 50mV.
1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com
6

6 Page



ページ 合計 : 7 ページ
 
PDF
ダウンロード
[ HV300LG-G 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。


共有リンク

Link :


部品番号部品説明メーカ
HV300LG-G

Inrush Current Limiter Controllers

Supertex
Supertex


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap