MAX14631/MAX14633
USB Charger Adapter Emulators
General Description
The MAX14631/MAX14633 are USB charger adapter
emulators with automatic host-charger identification cir-
cuitry for USB-dedicated chargers.
The devices allow USB wall adapters, travel chargers,
and other dedicated chargers to identify themselves as a
USB dedicated charger to USB devices, an Apple char-
ger to Apple products, and a Samsung Galaxy dedicated
charger port to legacy D+/D- short-detection devices that
use the D+ pullup of the USB transceiver.
The devices feature a control input that allows for charger
mode selection. The MAX14631 supports both Apple 2A
and USB Battery Charger (BC) revision 1.2 specification
compliant devices in Autodetection 2A mode, while also
supporting Apple 1A and USB BC compliant devices
in Autodetection 1A mode. The MAX14633 supports
Autodetection 1A mode, as well as Samsung Galaxy
Tablet 2A devices in SS 2A mode.
The devices also include an integrated optocoupler driver
for secondary feedback, as well as current-limiting capabili-
ties for space-constrained applications.
The devices are available in an 8-pin (2.9mm x 1.62mm)
SOT23 package, and are specified over the -40°C to
+85°C extended temperature range.
Benefits and Features
●
Optimized for Charging Adapters
•
Flexible Device and Adapter Connection Order
●
Faster Charging
•
Apple 2A Charging Capability in Autodetection
2A Mode
•
Samsung Galaxy Tablet 2A Charging Capability
(MAX14633)
●
Improved Charger Interoperability
•
Meets New USB BC Revision 1.2 Specification
• Backward Compatible with Previous USB BC
Revisions
•
Meets China YD/T1591-2009 Charging Specification
●
Greater User Flexibility
• Convenient CB Pin Controls the Charging Mode
●
Save Space on Board
• 2.9mm x 1.62mm, 8-Pin SOT23 Package
• High-ESD Human Body Model (HBM) Protection
on DP and DM
•
Integrated Optocoupler Driver for Secondary
Feedback
Ordering Information
appears at end of data sheet.
For related parts and recommended products to use with this part, refer
to
www.maximintegrated.com/MAX14631.related.
Applications
● USB Wall Chargers and Travel Adapters
● USB Car Chargers and Cigarette Lighter Adapters
● Universal Chargers including iPod
®
/iPad
®
/iPhone
®
Typical Operating Circuit
+5V
PRIMARY
CONTROL
FB
OD
MAX14631
MAX14633
150µF
+5V
V
BUS
USB A
CONNECTOR
D+
D-
GND
10kΩ
DC-DC
+5V
V
CC
0.1µF
GND
R
RSNS
CB
DP
DM
RSNS
iPod, iPad, iPhone are registered trademarks of Apple Inc.
19-6634; Rev 0; 3/13
MAX14631/MAX14633
USB Charger Adapter Emulators
Absolute Maximum Ratings
(All voltages referenced to GND.)
V
CC
, CB, D+, D-, OD ..............................................-0.3V to +6V
FB ............................................................. -0.3V to (V
CC
+ 0.3V)
RSNS....................................................................-0.3V to +0.3V
Continuous Current into OD ...........................................±100mA
Continuous Current into Any Other Terminal ...................±50mA
Continuous Power Dissipation (T
A
= +70°C)
SOT23 (derate 5.2mW/°C above +70°C).............412.4mW
Operating Temperature Range ........................... -40°C to +85°C
Maximum Junction Temperature
.....................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s)
................................. +300°C
Soldering Temperature (reflow) ......................................+260°C
Package Thermal Characteristics
(Note 1)
SOT23
Junction-to-Ambient Thermal Resistance (θ
JA
) .......
194°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ..................
70°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(V
CC
= 3.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +5.0V, T
A
= +25°C, unless otherwise
noted.) (Notes 2, 3)
PARAMETER
POWER SUPPLY
Operating Power-Supply Range
V
CC
Supply Current
POR
POR Delay
ANALOG SWITCH
Analog Signal Range
On-Resistance of DP/DM Short
Regulated OUT Voltage Reference
to RSNS
Output Accuracy
Internal Voltage Reference
Accuracy
External Current-Sense Reference
Threshold for Current Limit
I
OD
Maximum Current
V
OD
V
IL_REF
I
OD_MAX
V
OUT
= 3V to 4.75V
V
OUT
= 5.5V
V
OUT
= 2V, V
RSNS
= 100mV,
I
OD
= 10mA
V
DP
, V
DM
R
SHORT
V
DP
= 0.7V, I
DM_SINK
= 100µA to GND
0
4.5
V
CC
11
V
Ω
t
POR
V
CC
I
CC
3
Apple divider valid range
V
CC
= 5.0V
4.75
75
1.5
100
5.5
5.5
125
V
µA
V
ms
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT SECONDARY FEEDBACK (ERROR AMPLIFIER)
(Note 3)
R
RSNS
= 20mΩ, I
OUT
= 0 to 2A
(Note 4)
-3
-2.5
40
20
50
40
170
5
+3
+2.5
60
60
320
V
%
%
mV
mA
mV
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MAX14631/MAX14633
USB Charger Adapter Emulators
Electrical Characteristics (continued)
(V
CC
= 3.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +5.0V, T
A
= +25°C, unless otherwise
noted.) (Notes 2, 3)
PARAMETER
DYNAMIC
CB Switching Time
INTERNAL RESISTORS
DP/DM Short Pulldown
40V
CC
Bias
54V
CC
Bias
25V
CC
Bias
LOGIC INPUT (CB)
CB Input Logic-High
CB Input Logic-Low
CB Input Leakage Current
ESD PROTECTION
ESD Protection Level
(DP and DM Only)
ESD Protection level All Other Pins
Human Body Model
Human Body Model
±10
±2
kV
kV
V
IH
V
IL
I
IN
0 ≤ V
IN
≤ V
IL
and V
IH
≤ V
IN
≤ V
CC
,
V
CC
= 5.5V
-1
1.4
0.4
+1
V
V
µA
R
PD
350
39
52.6
24
500
40
53.6
25
700
41
54.6
26
kΩ
%V
CC
%V
CC
%V
CC
t
ON
CB = V
CC
to 0 or 0 to V
CC
4
µs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Comparator Characteristics (Note 5)
(V
CC
= 4.75V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +5.0V, T
A
= +25°C, unless otherwise
noted.) (Notes 2, 3)
PARAMETER
DM1 Comparator Threshold
DM1 Comparator Hysteresis
DM2 Comparator Threshold
DM2 Comparator Hysteresis
DP Comparator Threshold
DP Comparator Hysteresis
V
DPR
DP rising
MAX14631: CB = 0
MAX14633: CB = 0
MAX14631: CB = 1
45
57
V
DM2F
DM falling
6.31
SYMBOL
V
DM1F
DM falling
CONDITIONS
MAX14631: CB = 0
MAX14633: CB = 0
MAX14631: CB = 1
MIN
40
31
TYP
41
32
1
7
1
46
58
1
47
59
7.62
MAX
42
33
UNITS
%V
CC
%
%V
CC
%
%V
CC
%
Note 2:
All units are 100% production tested at T
A
= +25°C. Specifications over operating temperature range are guaranteed by
design.
Note 3:
V
CC
is referenced to RSNS.
Note 4:
The output accuracy includes internal offset of op amp, as well as the accuracy of the bandgap. This is to be completed by
the closed-loop control of the primary switcher.
Note 5:
The comparators are disabled during the POR delay.
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MAX14631/MAX14633
USB Charger Adapter Emulators
Typical Operating Characteristics
(V
CC
= +5.0V, V
CB
= 0V, T
A
= +25°C, unless otherwise noted.)
MAX14631 toc01
I
DP
= 10mA
MAX14631 toc02
CB = V
CC
V
CC
= 5.5V
SUPPLY CURRENT (µA)
6
4
V
CC
= 3.0V
2
0
V
CC
= 5.5V
80
60
40
20
0
T
A
= +25°C
T
A
= -40°C
SUPPLY CURRENT (µA)
8
ON-RESISTANCE ( )
100
120
100
80
60
40
T
A
= +85°C
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DP
(V)
3.0
3.5
4.0
4.5
5.0
5.5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
CB
(V)
V
CC
(V)
MAX14631 toc04
1.8
LOGIC-INPUT THRESHOLD (V)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.0
3.5
4.0
4.5
5.0
CB FALLING
CB RISING
R
RSNS
= 100m
6
5
V
BUS
(V)
4
3
2
1
5.5
0
0
0.2
0.4
0.6
0.8
1.0
SUPPLY VOLTAGE (V)
I
BUS
(A)
USB COMPLIANT
DEVICE ATTACH EVENT
MAX14631 toc06
CB LOGIC-HIGH TO LOGIC-
LOW EVENT
MAX14631 toc07
CH1 = DP
CH2 = DM
1ms/div
10µs/div
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MAX14631 toc05
2.0
LOGIC-INPUT THRESHOLD
vs. SUPPLY VOLTAGE
7
BUS VOLTAGE vs. OUTPUT CURRENT
R1 = CB
1 = DP
2 = DM
MAX14631 toc03
10
DP/DM SHORT ON-RESISTANCE
vs. DP SUPPLY VOLTAGE
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
120
140
SUPPLY CURRENT
vs. LOGIC LEVEL
MAX14631/MAX14633
USB Charger Adapter Emulators
Pin Configuration
TOP VIEW
DP
RSNS
GND
CB
1
2
3
4
+
MAX14631
MAX14633
8 DM
7 V
CC
6 FB
5 OD
SOT23
Pin Description
PIN
1
2
3
4
5
6
7
8
NAME
DP
RSNS
GND
CB
OD
FB
V
CC
DM
USB Connector D+ Connection
Current-Sense Resistor Input; USB Connector Ground
IC Ground. Return to the transformer output.
Control Bit. See Tables 1 and 2.
Optocoupler Driver Output
Feedback Control
Power Supply. Bypass V
CC
with a 0.1µF ceramic capacitor as close as possible to the pin.
USB Connector D- Connection
FUNCTION
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