hip1012a Intersil Corporation, hip1012a Datasheet - Page 9

• Manufacturer Part Number: hip1012a
• Description: Dual Power Distribution Controller
• Manufacturer: Intersil Corporation

Exploring and Using the HIP1012EVAL1
Board
The HIP1012EVAL1 is a flexible platform for a thorough
evaluation of the HIP1012A dual power supply controller.
This eval board comes in three separate parts allowing the
evaluation of two principal configurations. To simulate a
passive back plane implementation both the GENERIC and
LOAD sections are first connected together and then the
GENERIC board is connected onto the BUS board. For an
active backplane or for the HIP1012A on an interposer board
configuration, the BUS and GENERIC sections are first
connected together and then the load board is connected
onto the GENERIC board.
The HIP1012EVAL1 board has many built in features
besides the configuration flexibility described above.
The BUS board is designed so that adding suitable
connectors and/or power supply capacitive filtering is very
easy to do through the numerous through holes for each rail
voltage and ground. Passive backplane power sequencing
can be simulated by simply shortening the finger lengths for
the rail(s) that need to come up after initial ground
connection is made.
The GENERIC board, is a flexible evaluation platform with
many designed in features for user customizing and
evaluation. The circuit is shipped default configured in the
3.3V and 5V controller mode by jumpers for easy
reconfiguration (see Table 3 for jumper settings). The default
configuration is highlighted in Table 3. The default OC levels
are 5A on the 3.3V and 1A on the 5V supplies. To operate
the HIP1012 GENERIC board in its default configuration (3V
and 5V) a dedicated +12V power supply must be provided
for the HIP1012 through tie point, W1 on the generic board.
To operate the board in the +12V and 5V mode, JP2 and
JP3 need to be reconfigured (see Table 3) and a suitable
current load needs to be provided. A programmable
electronic current load is an excellent evaluation tool for this
device. The load board is configured to sink about 3A ±1A at
3.3V. For 12V operation, the load must be modified to sink
less than 5A, otherwise, an OC failure upon power will occur.
The GENERIC board is provided with a single pair of
N-Channel MOSFETs, if currents > 6A are to be evaluated
then an additional pair of MOSFETs can be installed in the
provided space to reduce distribution losses. Additionally, for
even higher current evaluations, space for TO-252AA, DPAK
or D
output side of the GENERIC board are provided for direct
access to a high current load. Performance customizing can
easily be accomplished by substitution/addition of several
SMD components to the existing layout or by utilizing the
included bread board area. See Table 5 for the component
listing and applicable formulae.
The LOAD board, consists of four load switches, output
resistive and capacitive loads and output on indicating
2
PAK devices has been provided. Tie points on the
(Figures 13 and 14)
9
HIP1012A
LED’s. The resistive loads are configured so that either no
current, a low or high current load relative to the OC trip
point can be invoked for both supplies. An OC event can be
emulated by switching both switches of any one output to the
on position (see Table 4, OC conditions highlighted). Load
connection sequencing can be done by shorting the desired
finger lengths. As noted, the GENERIC board is default
configured for 3V and 5V operation. For 12V evaluation
replace RL3 and RL4 with a suitable load.
JP #
SW13
1
1
1
2
2
3
3
4
4
4
4
0
0
1
1
Short to GND
Short to GND
Short to 5V
Short to 5V
Short to
OPEN /
SHORT
Open
Open
Short
Short
Open
Open
V
2-3
1-2
1-2
2-4
2-3
TABLE 3. JUMPER CONFIGURATION
SW14
DD
0
1
0
1
TABLE 4. LOAD CURRENT
PWRON2 shorted to ground. True HOT
SWAP mode. PWRON1 only controls reset
with rising edge.
PWRON2 shorted to 5V. Reset and turn on
controlled only by PWRON1. Single input
control mode
PWRON2 will be internally pulled high to
~2.5V, compatible with logic signal. The
HIP1012A can not turn on until PWRON2
is driven low.
HIP1012A must be powered from a
dedicated +12V power supply.
HIP1012A V
supply as load. See Decoupling Concerns in
Critical Items section.
C1 in circuit. Charge pump capacitor
necessary for 5V and 12V operating mode to
develop ~ 11.7V for 12VG voltage.
Shorts across charge pump capacitor, C1.
Capacitor not needed in 3V and 5V mode.
HIP1012A MODE/PWRON1 shorted to
ground. True HOT SWAP mode. PWRON2
rising edge only resets HIP1012A.
only single mode control.
HIP1012A MODE/PWRON1 connected to
V
invokes and configures HIP1012A for 3V
and 5V operation. Controlled by PWRON2
HIP1012A MODE/PWRON1 will be internally
pulled high to ~2.5V, compatible with logic.
Redundant controller mode when each
PWRON pin is driven by separate signals.
3.3V I
MODE/PWRON1 shorted to 5V. PWRON2
DD
A
0
2
4
6
pin. This along with JP3 installed
OUT
CIRCUIT CONDITION
DD
SW11
pin connected to same 12V
0
0
1
1
SW12
0
1
0
1
5.0V I
0.74
1.24
0.5
A
0
OUT