SM72442 Datasheet, PDF (10/14 Pages) National Semiconductor (TI) – Programmable Maximum Power Point Tracking Controller for Photovoltaic Solar Panels

reg1 Register Description
Bits
Field
41
pt_n
40
mppt_ok
39:30
Vout
29:20
Iout
19:10
Vin
9:0
Iin
Reset Value
1'h0
1'h0
10'h0
10'h0
10'h0
10'h0
reg3 Register Description
Bits
Field
55:47
RSVD
46
overide_adcprog
Reset Value
9'd0
1'b0
45
RSVD
1'b0
44:43
RSVD
2'd0
42
power_thr_sel
1'b0
41:40
39:30
bb_in_ptmode_s
el
iout_max
2'd0
10'd1023
29:20
vout_max
10'd1023
19:17
16:14
13:5
4
3
2
1
0
tdoff
tdon
dc_open
pass_through_se
l
pass_through_m
anual
bb_reset
clk_oe_manual
Open Loop
operation
3'h3
3'h3
9'hFF
1'b0
1'b0
1'b0
1'b0
1'b0
reg4 Register Description
Bits
Field
55:32
RSVD
31:24
Vout offset
23:16
Iout offset
15:8
Vin offset
7:0
Iin offset
reg5 Register Description
Bits
Field
55:40
RSVD
39:30
iin_hi_th
29:20
iin_lo_th
19:10
iout_hi_th
9:0
iout_lo_th
www.national.com
Reset Value
24'd0
8'h0
8'h0
8'h0
8'h0
Reset Value
15'd0
10'd40
10'd24
10'd40
10'd24
R/W
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
10
Bit Field Description
over voltage protection input to IC
Internal mppt_start signal (test only)
Voltage out
Current out
Voltage in
Current in
Bit Field Description
Reserved
When set to 1'b1,the below overide registers used
instead of ADC
Reserved
Reserved
Register override alternative for ADC2[9] when reg3
[46] is set ( 1/2^^5 or 1/2^^6 )
Register override alternative for ADC2[8:7] when reg3
[46] is set ( 5%,10%,25% or 50%)
Register override alternative when reg3[46] is set for
maximum current threshold instead of ADC ch4
Register override alternative when reg3[46] is set for
maximum voltage threshold instead of ADC ch0
Dead time Off Time
Dead time On time
Open loop duty cycle (test only)
Overrides PM pin 28 and use reg3[3]
Control Panel Mode when pass_through_sel bit is 1'b1
Soft reset
Enable the PLL clock to appear on pin 5
Open Loop operation (MPPT disabled, receives duty
cycle command from reg 3b13:5); set to 1 and then
assert & deassert bb_reset to put the device in
openloop (test only)
Bit Field Description
Reserved
Voltage out offset
Current out offset
Voltage in offset
Current in offset
Bit Field Description
Reserved
Current in high threshold for start
Current in low threshold for start
Current out high threshold for start
Current out low threshold for start