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PDF W83301 Data sheet ( Hoja de datos )

Número de pieza W83301
Descripción ACPI-STR Controller
Fabricantes Winbond 
Logotipo Winbond Logotipo



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No Preview Available ! W83301 Hoja de datos, Descripción, Manual

W83301R
Winbond
ACPI-STR Controller

1 page




W83301 pdf
W83301R
4.Pin Description
Preliminary
SYMBOL
STRDRV2/BTDRV
STRSEN2/BTSEN
STRDRV3/BTSINK
STRSEN3
GND
Vcc
C1
C2
ChrPmp
5VDLEN#
S5#
S3#
VSET1
VSET0
5VDLSB
5VDRV
PWOK
SS
STRSEN1
STRDRV1
PIN FUNCTION
Mode A: BT Current Source. Connect this pin to the gate of a suitable N-channel
1
MOSFET for driving bus termination regulator output.
Mode B: STR2 Driver. Connect this pin to the gate of a suitable N-channel
MOSFET for driving STR2 output.
2
Mode A: BT Sense. Connect this pin to the bus termination regulator output.
Mode B: STR2 Sense. Connect this pin to the STR2 output.
Mode A: BT Current Sink. This pin is used to drive a N-channel MOSFET to sink
3
the redundant current in the high-speed bus.
Mode B: STR3 Driver. Connect this pin to the gate of a suitable N-channel
MOSFET for driving STR3 output.
Mode A: Function Reserved. Pull up this pin to +5VSB through a 1.5 Kohm
4 resistor.
Mode B: STR3 Sense. Connect this pin to the STR3 output.
5 Power Ground. Connect this pin to ground.
6 Power Vcc. Input 5VSB supply.
7
Charge Pump Cap. Attach flying capacitor between this pin and C2 to generate
internally used high voltage from 5V power supply.
8
Charge Pump Cap. Attach flying capacitor between this pin and C1 to generate
internally used high voltage from 5V power supply.
9
Charge Pump output. This pin produces voltage doubled 5V supply by charge-
pumping. Bypass with a 0.1uF capacitor.
10 5VDL Enable. Control 5VDL voltage output. Pull-up internally.
11 S5 Status. Control signal governing the soft off state S5. Pull-up internally.
12 S3 Status. Control signal governing the soft off state S3. Pull-up internally.
13
Voltage Selection 1. Combine with VSET2 to select operation mode and output
voltages of STR regulators.
14
Voltage Selection 0. Combine with VSET1 to select operation mode and output
voltages of STR regulators.
15
5VSB Output Control. Connect this pin to the gate of a N-MOSFET to output
5VSB power to 5VDL.
16
5V Output Control. Connect this pin to the gate of a N-MOSFET to output 5V
power to 5VDL.
Power OK. Open collector input/output. Used to indicate the ready of 5Vin supply. If
17 any STR supply (only STR1 in mode A) occurs over current and induce under-
voltage, PWOK will be pull down.
Soft-Start. Attach a capacitor (0.033u) to this pin to determine the softstart rate. A
18
ramp generated by charging this capacitor with internal soft-start current (18uA) is
used to clamp the voltage rising slew rate of STR regulators and 5VDL. Soft starting
avoids too much rush current during voltage setup.
19 STR1 Sense. Connect this pin to the STR1 output.
20
STR1 Driver. Connect this pin to the gate of a suitable N-channel MOSFET for
driving STR1 output.
Confidential
Revision 0.6
3

5 Page





W83301 arduino
W83301R
Preliminary
7.3 Charge Pump
In order to simply the design circuit and provide a good-price solution for customer,
the W83301R integrate with a switched-capacitor voltage doubler charge pump to
provide a higher driving voltage (Up to 10 volt) and can drive a single N-channel
MOSFETs in each output.
7.4 Power OK
The W83301R use a bi-direction Power OK signal to ensure the system can work
normally. When the system jump from state S3 to state S0, the W83301R will monitor the
input signal from PWOK pin to ensure that external system power is OK and then switch
each outputs into S0 stage; In the other hand, the W83301R will pull down the Power OK
signal to inform the system that a over current and induce under-voltage occurred.
7.5 Soft-Start
During ‘S5off’ to ‘S5on’ and ‘S5on’ to ‘S0’ state transitions, the 5Vdual and STR
voltages need to ramp up from 0 to their set values respectively. The charging current
flowing to output capacitors must be limited to avoid supply drop-off.
In W83301R, an internal 18 uA current source (Iss) charges an external capacitor
(Css) to generate a linear ramp-up voltage on SS pin (Vss). The Vss slews from 0 to
about 9V during the above-mentioned state transitions, and the Vss slew rate is used to
clamp the ramp-up rate of 5Vdual and STR output voltages. This output clamping allows
power-ups free of supply drop-off events.
Since the outputs are ramped up in a constant slew-rate, the current dedicated to
charge any output capacitor can be calculated with the following formula:
ICOUT = Iss x (Cout / Css)
Some technique is included in W83301R to further reduce the total charging current:
In Mode B configuration, the start-up of ramp-up time STR3 (1.8V) will be advanced from
that of STR1 to reduce the overlap time of charging. And in Mode A configuration, the
bus-terminator is input clamped, and its output voltage slew-rate, so as its charging
current, will be limited to half of that of STR1.
Note that, too slow ramp-up rate is not recommended. If so, the state transition
mentioned above will be prolonged to much. Before Vss ramps up to its upper limit
(about 9V), the state transition will not be completed and will not go into next state.
Confidential
Revision 0.6
9

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