HIP1012A Ver la hoja de datos (PDF) - Renesas Electronics
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HIP1012A Datasheet PDF : 15 Pages
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HIP1012A
Electrical Specifications
PARAMETER
VDD = 12V, CVG = 0.01F, CTIM = 0.1F, RSENSE = 0.1, CBULK = 220F, ESR = 0.5,
TA = TJ = 0°C to 70°C, Unless Otherwise Specified (Continued)
SYMBOL
TEST CONDITIONS
MIN
TYP
Gate Turn-On Current
3X Gate Discharge Current
5V Undervoltage Threshold
3.3V Undervoltage Threshold
3.3/5VG High Voltage
ION5V
3XdisI
5VVUV
3.3VVUV
3/5VG
CVG = 0.01F
CVG = 0.01F, PWRON = Low
8
10
0.5
0.75
4.35
4.5
2.65
2.8
11.2
11.9
SUPPLY CURRENT AND IO SPECIFICATIONS
VDD Supply Current
VDD POR Rising Threshold
VDD POR Falling Threshold
Current Limit Time-Out
PWRON Pull-up Voltage
IVDD
TILIM
CTIM = 0.1F
PWRN_V PWRON pin open
4
8
9.5
10.0
9.3
9.8
16
20
1.8
2.4
PWRON Rising Threshold
PWR_Vth
1.1
1.5
PWRON Hysteresis
PWR_hys
0.1
0.2
PWRON Pull-Up Current
PWRN_I
60
80
Current Limit Time-Out Threshold (CTIM)
CTIM Charging Current
CTIM Discharge Current
CTIM Pull-Up Current
RILIM Pin Current Source Output
Charge Pump Output Current
Charge Pump Output Voltage
CTIM_Vth
CTIM_I
CTIM_disI
CTIM_disI
RILIM_Io
Qpmp_Io
Qpmp_Vo
VCTIM = 8V
CPUMP = 0.1F, CPUMP = 16V
No load
1.8
2
8
10
1.7
2.6
3.5
5
90
100
320
560
17.2
17.4
Charge Pump Output Voltage - Loaded
Qpmp_VIo Load current = 100A
16.2
16.7
Charge Pump POR Rising Threshold
Qpmp+Vth
15.6
16
Charge Pump POR Falling Threshold
Qpmp-Vth
15.2
15.7
MAX
12
-
4.65
2.95
-
10
10.7
10.3
24
3.2
2
0.3
100
2.2
12
3.5
6.5
110
800
-
-
16.5
16.2
UNITS
A
A
V
V
V
mA
V
V
ms
V
V
V
A
V
A
mA
mA
A
A
V
V
V
V
HIP1012A Description and Operation
The HIP1012A is a multifeatured dual power supply distribution
controller, including programmable current limiting regulation
and time to latch off. Additionally the HIP1012A operates both
as a +3.3V and 5V or a +5V and +12V power supply controller
with each mode having appropriate UnderVoltage (UV) fault
notification levels.
Upon initial power up HIP1012A can either isolate the voltage
supply from the load by holding the external N-Channel
MOSFET switches off or apply the supply rail voltage directly
to the load for true hot swap capability. In either case the
HIP1012A turns on in a soft start mode protecting the supply
rail from sudden current loading. If either PWRON pin is
pulled low the HIP1012A will be in true hot swap mode. Both
PWRON pins must be high to turn off the HIP1012A thus
isolating the power supply from the load through the external
FETs.
At turn-on, the gate capacitor of each external N-Channel
MOSFET is charged with a 10A current source. These
capacitors create a programmable ramp (soft turn-on). A
charge pump supplies the gate drive for the 12V supply switch
driving that gate to 17V.
The load currents pass through two external current sense
resistors. When the voltage across either resistor exceeds the
user programmed Overcurrent (OC) voltage threshold value,
(see Table 1) the controller enters current regulation. At this
time the time-out capacitor, CTIM, starts charging with a 10A
current source and the controller enters the time out period.
The length of the time out period is set by the single external
capacitor (see Table 2) placed from the CTIM pin (pin 10) to
ground and is characterized by a lowered gate drive voltage to
the appropriate external N-Channel MOSFET. Once CTIM
charges to 2V, an internal comparator is tripped resulting in
both N-Channel MOSFETs being latched off.
FN4419 Rev 6.00
March 2004
Page 5 of 15
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