SM72295_15 Datasheet, PDF (2/17 Pages) Texas Instruments – SM72295 Photovoltaic Full Bridge Driver

SM72295
SNVS688E – OCTOBER 2010 – REVISED APRIL 2013
Connection Diagram
1
SIA
2
SOA
3 _IIN
4 _BIN
5 _AGND
6 _LIA
7 _HIA
8 _HIB
9 _LIB
10 _PGOOD
11 _BOUT
12 _IOUT
13 _SOB
14 _SIB
SM72295
28
HSA
HOA ²⁷
HBA ²⁶
VCCA ²⁵
LOA ²⁴
PGND ²³
LOB ²²
VCCB ²¹
HBB ²⁰
HOB ¹⁹
HSB ¹⁸
VDD ¹⁷
OVS ¹⁶
OVP ¹⁵
Figure 1. Top View
SOIC-28
www.ti.com
Pin
1
2
3
4
5
6, 9
7, 8
10
11
12
13
14
15
16
17
18, 28
PIN DESCRIPTIONS
Name Description
Application Information
SIA Sense high input for input current Tie to positive side of the current sense resistor through an external gain
sense transconductance amplifier programming resistor (RI). Amplifier transconductance is 1/RI.
S0A Sense low input for input current Tie to negative side of the current sense resistor through an external gain
sense transconductance amplifier programming resistor. Amplifier transconductance is 1/RI.
IIN Output for current sense
transconductance amplifier
Output of the input current sense amplifier. Requires an external resistor to
ground (RL). Gain is RL/RI, where RI is the external resistor in series with the
SIA pin.
BIN Buffered IIN
Buffered IIN.
AGND Analog ground
Ground return for the analog circuitry. Tie to the ground plane under the IC
LIA, LIB Low side driver control input
The inputs have TTL type thresholds. Unused inputs should be tied to ground
and not left open.
HIA, HIB High side driver control input
The inputs have TTL type thresholds. Unused inputs should be tied to ground
and not left open.
PGOOD Power good indicator output
Open drain output with an internal pull-up resistor to VDD indicating VCC is in
regulation. PGOOD low implies VCC is out of regulation.
BOUT Buffered IOUT
Buffered IOUT.
IOUT Output for current sense
comparator.
Output of the output current sense amplifier. Requires an external resistor to
ground (RL). Gain is RL/RI, where RI is the external resistor in series with the
SIB pin.
S0B Sense low input for output current Tie to negative side of the current sense resistor through an external gain
sense amplifier
programming resistor. Amplifier transconductance is 1/RI.
SIB Sense high input for output current Tie to positive side of the current sense resistor through an external gain
sense amplifier
programming resistor (RI). Amplifier transconductance is 1/RI.
OVP Over voltage indicator output
Open drain output with an internal pull-up resistor to VDD indicating OVS >VDD.
OVP is low when OVS>VDD.
OVS Sense input for over voltage
Requires an external resistor divider. VDD is the reference voltage.
VDD 3.3V or 5V regulator output
Bypass with 0.1uF. Reference for over voltage shutdown and IOUT/IIN clamp
HSA, High side MOSFET source
HSB connection
Connect to bootstrap capacitor negative terminal and the source of the high side
MOSFET.
2
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