Linear Technology DC2417A Demo Manual

DESCRIPTION
Demonstration circuit 2417A is intended to demonstrate
the performance of the
undervoltage (UV), and reverse supply protection controller.
This controller protects circuits from input voltages
that may be too high, too low or negative. It operates
by controlling the gates of two back-to-back connected
N-channel MOSFETs to keep the output in a safe range.
The UV and OV setpoints are configured by the resistive
divider on the UV and OV inputs. Asserting the SHDN pin
disables the MOSFETs and places the LTC4367 in a low
current shutdown state. The FAULT pin asserts when the
controller is in the shutdown mode or when the input
voltage is outside of the UV/OV window. The LTC4367
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V Input Voltage Range
IN
V Input Supply Undervoltage Lockout
IN(UVLO)
I Input Supply Current; On
VIN
I Reverse Input Supply Current
VIN(R)
∆V Gate Drive (GATE – V
GATE
I Gate Pull-Up Current
GATE(UP)
I Gate Fast Pull-Down Current
GATE(FAST)
I Gate Slow Pull-Down Current
GATE(SLOW)
V UV Input Threshold Voltage
UV
V OV Input Threshold Voltage
OV
t Gate Fast Turn-Off Delay
GATE(FAST)
t OV, UV Fault Propagation Delay
FAULT
V SHDN Input Threshold
SHDN
V Board UV Range
UV_BOARD
V Board OV Range
OV_BOARD
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100V Overvoltage, Undervoltage and
Reverse Supply Protection Controller
LTC4367 100V overvoltage (OV),
Specifications are at T
CONDITIONS
Operating Range
Protection Range
V Rising
IN
SHDN = 2.5V
Off SHDN = 0V, V
V = –40V, V
IN
) V = V
OUT IN
V = V
IN
GATE = 15V, V
GATE = 20V, V
GATE = 20V, V
UV Falling
OV Rising
C
GATE
Overdrive = 50mV, V
SHDN Falling
DEMO MANUAL DC2417A
can withstand DC voltages between –40V and 100V and
has an operating range of 2.5V to 60V.
The DC2417A includes the LTC4367, two back-to-back
connected power MOSFETs, three jumpers and three
LEDs to indicate the input and output voltages and the
FAULT pin signal.
The DC2417A is assembled in two options: DC2417A-A,
which is populated with LTC4367, and DC2417A-B, which
uses LTC4367-1.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2417A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
= 25°C
A
= V
IN OUT
= 0V
OUT
= 5.0V, I = 0μA, –1μA
OUT GATE
= 12V to 34V, I = –1µA
OUT GATE
= V = 12V
IN OUT
= V = 12V
IN OUT
= V = 12V
IN OUT
= 2.2nF, UV or OV Fault
= V = 12V
IN OUT
LTC4367
MIN TYP MAX
2.5 60
–40 100
1.8 2.2 2.4
30 90
5 20
–1.5 –2
7.2 8.7 10.8
10 11 12.2
–20 –35 –50
30 60 90
50 90 160
492.5 500 507.5
492.5 500 507.5
2 4
1 2
0,4 0.75 1.2
5.75 5.97 6.17
14.44 14.95 15.47
UNITS
V
V
V
µA
µA
mA
V
V
µA
mA
µA
mV
mV
µs
µs
V
V
V
dc2417af
1