MAX14566E Datasheet, PDF (13/15 Pages) Maxim Integrated Products – USB Host Charger Identification Analog Switches 2mm x 2mm, 8-Pin TDFN Package

USB Host Charger Identification
Analog Switches
USB
VCC
TRANSCEIVER
TDM TDP
0.1µF
GND
DP
DM
MAX14566AE
1kI
CEN
D+
USB
CONNECTION
D-
V_BUS
150µF
VBUS
CURRENT-LIMIT
SWITCH
EN
VCC
+5V POWER
SUPPLY
10kI
CB
GND
CLS EN
SYSTEM CONTROL
STANDBY
Figure 7. MAX14566AE VBUS Discharge Circuit
Bus Voltage Discharge
The MAX14566AE automatic current-limit switch control
output can be used to discharge the VBUS during VBUS
reset. When the system controls the current-limit switch
for VBUS toggle, the output capacitor can be discharged
slowly depending upon the load. If fast discharge of the
VBUS capacitor is desired, the CEN output can be used
to achieve the fast discharge as shown in Figure 7.
Data Contact Detect
All the devices support USB devices that require detect-
ing the USB data lines prior to charging. When a USB
Revision 1.2-compliant device is attached, the USB data
lines DP and DM are shorted together. The short remains
until it is detected by the USB device. This feature guar-
antees appropriate charger detection if a USB Revision
1.2-compliant device is attached. The autodetection
charger mode is activated after the data contact detect
is established. CB must be set low to activate data con-
tact detect.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
Extended ESD Protection
(Human Body Model)
ESD-protection structures are incorporated on all pins
to protect against electrostatic discharges up to Q2kV
(HBM) encountered during handling and assembly. DP
and DM are further protected against ESD up to Q15kV
(HBM) without damage. The ESD structures withstand
high ESD both in normal operation and when the device
is powered down. After an ESD event, the device contin-
ues to function without latchup (Figure 8).
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