sm72441mtx National Semiconductor Corporation, sm72441mtx Datasheet - Page 4

• Manufacturer Part Number: sm72441mtx
• Description: Programmable Maximum Power Point Tracking Controller For Photovoltaic Solar Panels
• Manufacturer: National Semiconductor Corporation

www.national.com
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin Descriptions
1
2
3
4
5
6
7
8
9
AVOUT A/D Input to sense the output voltage.
AIOUT A/D Input to sense the output current.
VDDD Digital supply voltage. This pin should be connected to a 5V supply, and bypassed to VSSD with a 0.1uF monolithic
VDDA Analog supply voltage. This voltage is also used as the reference voltage. This pin should be connected to a 5V supply,
Name Description
VSSD Digital ground. The ground return for the digital supply and signals.
VSSA Analog ground. The ground return for the analog supply and signals.
AVIN
OVP
RST
NC1
NC2
NC3
NC4
NC5
NC6
NC7
LED
AIIN
NC8
NC9
HIB
HIA
LIB
LIA
A0
A2
A4
A6
Active low signal. External reset input signal to the digital circuit.
No Connect. This pin should be grounded.
ceramic capacitor.
No Connect. This pin should be pulled up to the 5V supply using 10k resistor.
No Connect. This pin should be grounded using a 10k resistor.
No Connect. This pin should be grounded using a 10k resistor.
No Connect. This pin should be pulled up to 5V supply using 10k resistor.
No Connect. This pin should be pulled up to 5V supply using 10k resistor.
No Connect. This pin should be grounded.
LED pin outputs a pulse during normal operation.
and bypassed to VSSA with a 1uF and 0.1uF monolithic ceramic capacitor.
A/D Input Channel 0. Connect a resistor divider to 5V supply to set the maximum output voltage. Please refer to
application section for more information on setting the resistor value.
A/D Input to sense input voltage.
A/D Input Channel 2. Connect a resistor divider to 5V supply to set MPPT update rate. Please refer to application
section for more information on setting the resistor value.
A/D Input Channel 4. Connect a resistor divider to 5V supply to set the maximum output current. Please refer to
application section for more information on setting the resistor value.
A/D Input to sense input current.
A/D Input Channel 6. Connect a resistor divider to 5V supply to set the maximum output voltage slew rate. Please
refer to application section for more information on setting the resistor value.
No Connect. This pin should be grounded using a 10k resistor.
No Connect. This pin should be connected with 150k pull-up resistor to 5V supply.
Low side boost PWM output.
High side boost PWM output.
High side buck PWM output.
Low side buck PWM output.
Overvoltage Protection Pin. Active Low. SM72441 will reset once voltage on this pin drops below its threshold voltage.
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