SLUSBC8 – DECEMBER 2013
YFP Package
(TOP VIEW)
A1
PGND
A2
PGND
A3
PGND
A4
PGND
B1
AC2
B2
AC2
B3
AC1
B4
AC1
C1
BOOT2
C2
RECT
C3
RECT
C4
BOOT1
D1
OUT
D2
OUT
D3
OUT
D4
OUT
E1
COMM2
E2
CLAMP2
E3
CLAMP1
E4
COMM1
F1
TS-CTRL
F2
FOD
F3
/AD-EN
F4
/CHG
G1
ILIM
G2
EN2
G3
EN1
G4
AD
PIN FUNCTIONS
NAME
AC1
AC2
BOOT1
BOOT2
RECT
OUT
COMM1
COMM2
CLAMP2
CLAMP1
PGND
YFP
B3, B4
B1, B2
C4
C1
C2, C3
D1, D2,
D3, D4
E4
E1
E2
E3
A1, A2,
A3, A4
I/O
I
I
O
O
O
O
O
O
O
O
AC input from receiver coil antenna.
Bootstrap capacitors for driving the high-side FETs of the synchronous rectifier. Connect a 10 nF ceramic
capacitor from BOOT1 to AC1 and from BOOT2 to AC2.
Filter capacitor for the internal synchronous rectifier. Connect a ceramic capacitor to PGND. Depending on
the power levels, the value may be 4.7
μF
to 22
μF.
Output pin, delivers power to the load.
Open-drain output used to communicate with primary by varying reflected impedance. Connect COMM1
through a capacitor to either AC1 or AC2 for capacitive load modulation (COMM2 must be connected to the
alternate AC1 or AC2 pin). For resistive modulation connect COMM1 and COMM2 to RECT via a single
resistor; connect through separate capacitors for capacitive load modulation.
Open drain FETs which are utilized for a non-power dissipative over-voltage AC clamp protection. When the
RECT voltage goes above 15 V, both switches will be turned on and the capacitors will act as a low
impedance to protect the IC from damage. If used, CLAMP1 is required to be connected to AC1, and
CLAMP2 is required to be connected to AC2 via 0.47 µF capacitors.
Power ground
DESCRIPTION
8
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