Datasheet

F1
TS-CTRL
E1
COM2
D1
OUT
C1
BOOT2
B1
AC2
A1
PGND
F2
FOD
E2
CLMP2
D2
OUT
C2
RECT
B2
AC2
A2
PGND
D3
OUT
C3
RECT
E4
COM1
D4
OUT
C4
BOOT1
B4
AC1
E3
CLMP1
B3
AC1
F3
/AD-EN
A4
PGND
G1
ILIM
A3
PGND
G2
EN2
G3
EN1
G4
AD
F4
/CHG
AC1
2
BOOT1
3
OUT
4
CLMP1
5
COM1
6
/CHG
7
/AD-EN
8
AD
9
AC2
19
RECT
18
BOOT2
17
CLMP2
16
COM2
15
FOD
14
TS/
CTRL
13
ILIM
12
EN1
10
EN2
11
PGND
1
PGND
20
bq51013B
www.ti.com SLUSB62A –MARCH 2013–REVISED OCTOBER 2013
YFP Package RHL Package
(TOP VIEW) (TOP VIEW)
PIN FUNCTIONS
NAME YFP RHL I/O DESCRIPTION
AC1 B3, B4 2 I
AC input from receiver coil antenna.
AC2 B1, B2 19 I
BOOT1 C4 3 O 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.
BOOT2 C1 17 O
Filter capacitor for the internal synchronous rectifier. Connect a ceramic capacitor to PGND.
RECT C2, C3 18 O
Depending on the power levels, the value may be 4.7 μF to 22 μF.
D1, D2,
OUT 4 O Output pin, delivers power to the load.
D3, D4
COM1 E4 6 O Open-drain output used to communicate with primary by varying reflected impedance. Connect
through a capacitor to either AC1 or AC2 for capacitive load modulation (COM2 must be
connected to the alternate AC1 or AC2 pin). For resistive modulation connect COM1 and COM2 to
COM2 E1 15 O
RECT via a single resistor; connect through separate capacitors for capacitive load modulation.
CLMP2 E2 16 O 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
CLMP1 E3 5 O
connected to AC1, and Clamp2 is required to be connected to AC2 via 0.47µF capacitors.
A1, A2,
PGND 1, 20 Power ground
A3, A4
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