HV311LG Supertex, HV311LG Datasheet

Hot Swap & Power Distribution Active Low

HV311LG

Manufacturer Part Number
HV311LG
Description
Hot Swap & Power Distribution Active Low
Manufacturer
Supertex
Datasheets

Specifications of HV311LG

Package Type
SOIC N
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
3.9mm
Product Length (mm)
4.9mm
Mounting
Surface Mount
Pin Count
8
Operating Temperature Range
- 40 C to + 125 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8
Lead Free Status / RoHS Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HV311LG-G
Manufacturer:
SUPERTEX
Quantity:
16 102
Part Number:
HV311LG-M908
Manufacturer:
SUPERTEX
Quantity:
20 000
Features
Applications
Typical Application Circuit
10 to 90V operation, positive or negative
supply
UV/OV lock out & power-on-reset
Circuit breaker
100ms startup timer
Automatic retry or latched operation
Low Power, 400µA sleep mode
8-Lead SOIC Package
48V central office switching
24V cellular and fixed wireless systems
24V PBX systems
Line cards
48V powered ethernet for VoIP
Distributed power systems
Power supply control
48V storage networks
Electronic circuit breaker
GND
-48V
9.76kΩ
6.81kΩ
487kΩ
R3
R1
R2
3
2
UV
OV
VEE
4
V DD
8
12.5mΩ
R4
1235 Bordeaux Drive, Sunnyvale, CA 94089
SENSE
5
HV301
Hot Swap Controller
GATE
6
IRF530
Q1
General Description
The Supertex HV301 Hot Swap Controller provides inrush current limiting and
other power supply support functions for hot swap equipment. Current limiting is
provided by control of an external MOSFET which is placed in the return line of
the power supply connection. Placement in the return allows use of an N-channel
MOSFET without the need for high side driving.
An internal clamp at the GATE pin activates when full bias for the HV301 is not
available, thus keeping the MOSFET in the off-state during the initial insertion
phase. As soon as adequate bias is available for the main control circuits, the UV
(undervoltage) and OV (overvoltage) pins check for normal operating voltage on
the power supply input.
Once normal operating voltage is present, the GATE voltage for the external
MOSFET ramps up at a constant rate. The rate is controlled by the value of an
external capacitor placed at the RAMP pin. At some point the external MOSFET
channel is enhanced, allowing power supply current to flow, thereby energizing
downstream power supply capacitors.
During the GATE ramp up the power supply current is monitored with the aid
of an external sense resistor which forces reduction in the ramp rate when the
power supply current reaches a set limit. The limit is set by the value of the
external sense resistor and the threshold of the current sense amplifier (50mV).
Once inrush current subsides or the drain voltage ceases to drop, the GATE
voltage resumes its rise to the output voltage of an internal regulator V
an output voltage ranging from 8.5 to 12V. When GATE is within 1.2V of V
GATE is pulled high to V
is released to high impedance, and the HV301 enters a low power mode.
The HV301 includes a start-up timer and a circuit breaker function to protect the
MOSFET from excessive power dissipation. The start-up timer trips when the
start-up phase exceeds 100ms. The circuit breaker trips at double the current
limit threshold (100mV). Upon tripping of either the start-up timer or the circuit
breaker the MOSFET is turned off, and the PWRGD pin is pulled low. Thereafter,
a programmable automatic retry timer allows the MOSFET to cool down before
resetting and restarting. The automatic retry can be disabled by adding an
external resistor at the RAMP pin (about 2.5MΩ, see applications section).
10nF
C1
PWRGD
RAMP
7
-48V
1
REG
NOTES:
Tel: 408-222-8888
with an internal switch, the open-drain PWRGD pin
C
1. Undervoltage threshold (UV) set to 35V.
2. Overvoltage threshold (OV) set to 65V.
3. Startup current set to 4A.
4. Circuit breaker set to 8A.
5. 100ms max startup time.
6. Automatic retry enabled.
LOAD
CONVERTER
ENABLE
DC/DC
PWM
www.supertex.com
+5.0V
COM
HV301
REG
, with
REG
,

Related parts for HV311LG

HV311LG Summary of contents

Page 1

... Hot Swap Controller General Description The Supertex HV301 Hot Swap Controller provides inrush current limiting and other power supply support functions for hot swap equipment. Current limiting is provided by control of an external MOSFET which is placed in the return line of the power supply connection. Placement in the return allows use of an N-channel MOSFET without the need for high side driving ...

Page 2

... Y = Last Digit of Year Sealed Week Sealed HV301 L = Lot Number “Green” Packaging 8-Lead SOIC (LG Max Units Conditions 90 V --- 700 µ 48V, mode = limiting DD 450 µ 48V, mode = standby Low to high transition - V High to low transition - mV --- 1 1. 1.9V 0. 120 1.9V 0. ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 3

... EE Max Units Conditions 1.9V 0. µ 1. 0.5V, External MOSFET is IRF530 ) µ SENSE - ms --- - µs --- - ms --- - ms --- - V --- 120 ms --- May be extended by external RC 5.0 µs circuit - s --- - V PWRGD is high 0 1.0mA, PWRGD is low PWRGD 500 ns --- 500 ns --- = 3.0V for an IRF530. th ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 4

... RAMP current is reduced to zero, and the RAMP and GATE voltages stop rising, thereby prevent- ing a further rise in the power supply current. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 4 VDD PWRGD V REG mirror Transconductor 5kΩ ● Tel: 408-222-8888 ● www.supertex.com HV301 GATE ...

Page 5

... Bordeaux Drive, Sunnyvale, CA 94089 123 = V · DF FTH UVS · 123 FTH UVS LEN UEN = DF · V RTH UV LEN = DF · V FTH OV UEN = 38.0V LEN = 59.8V UEN determine the maximum CS (the maximum in- MAX and the value ● Tel: 408-222-8888 ● www.supertex.com HV301 and the ...

Page 6

... LIM LOAD VDD t = (100μ)(48) / (1) LIM t = 4.8ms LIM minus about 1.2V. REG I · · (V – (1. RAMP PWRGD RAMP REG t = (10n)(10 – (1 1/7.4))/(10μ) PWRGD t = 4.3ms PWRGD ● Tel: 408-222-8888 ● www.supertex.com HV301 rises through VIN RAMP . As current MAX ) + ΔV )) GS(TH) GS ...

Page 7

... For this application the HV301 with active high PWRGD is recommended where the PWRGD pins of multiple hot swap circuits can be connected in a wired OR configuration. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 SENSE EE Pin Pin Sense Resistor ● Tel: 408-222-8888 ● www.supertex.com HV301 To Source of MOSFET ...

Page 8

... VDD PWRGD HV301 RAMP VEE SENSE GATE 10nF R4 Q1 IRF530 12.5mΩ ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 8 1 ENABLE +5.0V C LOAD DC/DC COM PWM CONVERTER is close ENABLE +5.0V C LOAD DC/DC COM PWM CONVERTER is close ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 9

... VEE SENSE GATE 10kΩ 10nF R5 12.5mΩ ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 9 1 ENABLE +5.0V C LOAD DC/DC COM PWM CONVERTER 6 Q1 IRF530 is close ENABLE +5.0V C LOAD DC/DC COM PWM CONVERTER 6 Q1 IRF530 is close ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 10

... C1 -48V 10nF R4 60mΩ NOTES: 1. Undervoltage Shutdown (UV) set to 35V. 2. Overvoltage Shutdown (OV) set to 65V. 3. Current Limit set to 0.83A. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 IRF530 1 ENABLE +5V C LOAD DC/DC COM PWM CONVERTER IRF530 is close ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 11

... OV RAMP VEE SENSE GATE 9.76kΩ 12.5mΩ ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 11 1 ENABLE +5.0V C LOAD COM DC/DC PWM CONVERTER 6 Q1 IRF530 is close ENABLE +5V C LOAD DC/DC COM PWM CONVERTER Q1 IRF530 is close ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 12

... The positive power supply pin. Connect to the positive of the incoming power supply. 8 VDD PWRGD R1 487kΩ HV301 R2 6.81kΩ VEE SENSE GATE RAMP 9.76kΩ IRF530 12.5mΩ ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 12 1 ENABLE +5V C LOAD DC/DC COM PWM CONVERTER 2.5M Ω is close ● Tel: 408-222-8888 ● www.supertex.com HV301 ...

Page 13

... Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship ...

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