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PDF CAT6500 Data sheet ( Hoja de datos )
| Número de pieza | CAT6500 | |
| Descripción | 3.0A Power Selector Switch | |
| Fabricantes | ON Semiconductor | |
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CAT6500
3.0 A Power Selector Switch
Description
CAT6500 is an automatic power switch designed to select between
two power sources and direct that power to a load for battery charging
or system power.
CAT6500’s power inputs withstand voltages of up to 18 V and
protect the downstream load from voltages exceeding 7 V. In the event
of a polarity reversal at either input CAT6500’s internal power
switches will shut off to prevent discharge of the system’s internal
power source.
Low resistance power switches handle currents in excess of 3 A and
when OFF block current flow in both directions. CAT6500 can operate
in reverse mode in which internal system power is be directed to either
of the power input ports for powering an external device, such as a
USB On−The−Go appliance.
Features
• Autonomous Switching between 2 Power Sources
• Withstands +18 V to −5 V on Either Power Input
• 80 mW Switches (typ.) for Low Power Loss
• Reverse−Mode for Powering External Devices
• Over Voltage Protection of Downstream Load
• Compatible with USB−OTG Devices
• 32−Lead WQFN 4.4 mm x 4.4 mm Package
• This Device is Pb−Free, Halogen Free/BFR Free and is RoHS
Compliant
Typical Applications
• Mobile Phones
• PDAs
• Personal Navigation Devices
PS1
PS2
VCC
0.1 mF
C1
CAT6500
PWR_OUT
SW1_STAT
SW2_STAT
RM_EN1
RM_EN2
PRIORITY
Power Management IC
or Battery Charge
+
Li−Ion
−
Figure 1. Typical Application Circuit
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1
WQFN−32
HVA SUFFIX
CASE 485BN
MARKING DIAGRAM
6500
SSSS
ALYW
G
6500
SSSS
A
L
Y
W
G
= Specific Device Code
= Last Four Digits of Assembly Lot Number
= Assembly Location
= Wafer Lot Number (optional)
= Production Year
= Production Week
= Pb−Free Package
ORDERING INFORMATION
Device
CAT6500HVA−T2
Package
WQFN−32
(Pb−Free)
Shipping†
2,000/
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2015
November, 2015 − Rev. 2
1
Publication Order Number:
CAT6500/D
1 page  
CAT6500
Table 5. ELECTRICAL OPERATING CHARACTERISTICS
(VCC = 3.9 V, C1 = 0.1 mF, unless otherwise noted. Typical values TA = 25°C, Min/Max values TA = −40°C to +85°C.)
Parameter
Test Conditions
Symbol Min
Typ
INPUT / OUTPUT
Input Voltage
Operating Current; SW1 and SW2 ON
PS1 or PS2 normal operation mode
PS1 or PS2 overvoltage protection mode
VCC
Measured at VCC
RM_EN1 = 1, RM_EN2 = 1
1.7 V < PS1 < 2.4 V, 1.7 V < PS2 < 2.4 V
VPS 1.6 3.9
VPS 1.6 3.9
VCC 2.5 3.9
IVCC − 85
Quiescent Current; SW1 and SW2 OFF Measured at VCC
IVCC − 35
PRIORITY = 1, RM_EN1 = 0, RM_EN2 = 0
PS1 < 1.5 V, PS2 < 1.5 V
Input Voltage Detect
Over Voltage Detection
Over Voltage Hysteresis
Reverse Voltage Detect Threshold
POWER SWITCHES
PS1, PS2, voltage rising
PS1, PS2, voltage falling
PS1, PS2, voltage rising
PS1, PS2, voltage falling
PS1, PS2
VDETR
VDETF
VOVP
VHYS
VREV
1.6
0.1
6.5
100
−0.7
1.7
0.15
7.0
−
–
Switch Resistance; SW1, SW2
Measured from PSx to PWR_OUT
PS1 or PS2 = 2.5 V, 5°C
RON − 80
PS1 or PS2 = 5 V, 25°C
PS1 or PS2 = 5 V, −40°C to +85°C
−−
−−
LOGIC
Input Threshold Voltage
Voltage Increasing, Logic High
PRIORITY, RM_EN1, RM_EN2
Vth_HIGH 1.0
−
Voltage Decreasing, Logic Low
PRIORITY, RM_EN1, RM_EN2
Vth_LOW 0.4
−
Input Current
Output Current HIGH
PRIORITY, Pull−Up
RM_ENx, Pull−Down
VOH = VIN – 0.3 V
SW1_STAT, SW2_STAT
IIN − 10
− 10
IOH − 10
Output Voltage LOW
IOL = 3.0 mA
SW1_STAT, SW2_STAT
VOL − 0.3
TIMING
SW Turn−on Delay Time
Measured from rising edge of RM_ENx
to 10% of voltage at PSx; PSx = 2.0 V
tON_DLY
−
100
SW Rise Time
Measured at PWR_OUT
10% to 90% of voltage applied at PSx
PS = 2.0 V
tRISE − 200
Measured at PWR_OUT
10% to 90% of voltage applied at PSx
PS = 5 V
− 100
SW Turn−off Time
Measured at PWR_OUT
90% to 10% of voltage applied at PSx
tOFF
−
−
Over Voltage Turn−off Time
Break−Before−Make Off Time
PS = 0 V ³ 10 V
PS = 5 V ³ 10 V
Measured at PWR_OUT, OFF time during
transition from PS1 ³ PS2 or PS2 ³ PS1
tOFF_OV1
tOFF_OV2
tOFF_BBM
−
−
−
10
10
400
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
TSD – 145
TSH – 10
Max Unit
7.7 V
12
5.5
120 mA
45 mA
1.8 V
0.3
7.8 V
250 mV
−1.0 V
110 mW
−
135
1.5 V
0.8
20 mA
20
15 mA
0.4 V
− ms
300 ms
250
25 ms
− ms
−
− ms
– °C
– °C
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5
5 Page 
CAT6500
Over−Voltage
CAT6500 is designed to withstand input voltages of up to
18 V on the PS1 or PS2 inputs. In the event of such a fault
condition, SW1 or SW2, whichever is exposed to the fault
will shut OFF. This fault protection is voltage sensitive,
activating at 7 V typically and overrides control inputs
PRIORITY, RM_EN1 and RM_EN2.
The response time of the over voltage detection circuit is
constant and independent of the rise time of the overvoltage
event, however the voltage transient seen at PWR_OUT will
vary depending upon the operating conditions at the time of
the event. Case 1 and Case 2 of Figure 5 illustrates this. In
Case 1, an overvoltage is applied to a PS input as would
happen if a malfunctioning or improper charger were used
to recharge a handheld appliance. The internal FET switch
is initially off and the application of voltage at the PS input
initiates turning it ON, but the delay associated with turning
ON the switch is very long compared to the overvoltage
comparator’s response time. The resulting voltage transient
at PWR_OUT is very small to non−existent because the FET
switch never gets the chance to turn fully ON.
Case 2 assumes voltage is applied to a PS input and the
internal FET switch is ON. If for some reason the applied
voltage surges above the overvoltage threshold the FET will
be turned OFF but a transient will be seen at PWR_OUT.
The degree to which the voltage at PWR_OUT exceeds the
overvoltage threshold depends upon the rate of voltage rise
at PS compared to the comparator’s response time.
CAT6500 is tolerant to negative voltages as well and shuts
OFF SW1 and SW2 when either PS1 or PS2 goes negative
by more than 0.7 V.
Table 6. POWER SWITCH CONTROL AND SELECTION
Inputs
PS1 PS2 RM_EN1 RM_EN2 PRIORITY
L L 00 X
H L 00
L H 00 0
H H 00
H L 00
L H 00 1
H H 00
PWR_OUT
Hi−Z
1
0
Hi−Z
PWR_OUT
PWR_OUT PWR_OUT
0
1
1
1
X
Connections
SW1
SW2
00
10
01
10
10
01
01
10
01
11
PWR_OUT
0
PS1
PS2
PS1
PS1
PS2
PS2
X
X
X
Outputs
SW1_STAT
1
0
1
0
0
1
1
0
1
0
SW2_STAT
1
1
0
1
1
0
0
1
0
0
L ≤ 1.7 V H ≥ 1.7 V
for voltage rising at PS
Default = 0
if left floating
Default = 1 0 = Open 1 = Closed
if left floating
Break−Before−Make Switching
When switching between power sources either under
automatic control (PRIORITY) or in override (RM_EN),
CAT6500 disables the active switch before the new
connection is made. This ensures there will be no unintended
cross conduction between PS1 and PS2. Even when SW1
and SW2 are commanded to be ON simultaneously there is
a brief interval when both SW1 and SW2 are OFF. Figure 6
illustrates this.
Thermal Considerations
Under normal operating conditions SW1 and SW2 will
dissipate some amount of heat which is a function of the
current through the switch and RON. Typical heating curves
are shown in Figure 19.
CAT6500 is protected against overheating by an internal
temperature sensor. Should the chip’s temperature reach
145°C CAT6500 will shut off both power switches until the
die temperature drops to below approximately 135°C, at
which time the power switches will be returned to their
original operating state. If the temperature again exceeds the
thermal shutdown limit both switches will be disabled and
this cycling will continue until current flowing through the
switch is reduced, the load is removed or the switch is turned
off under system control.
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11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet CAT6500.PDF ] | |
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