MPT612 NXP Semiconductors, MPT612 Datasheet - Page 24

• Manufacturer Part Number: MPT612
• Description: The MPT612, the first dedicated IC for performing the Maximum Power Point Tracking (MPPT) function, is designed for use in applications that use solar photovoltaic (PV) cells or in fuel cells
• Manufacturer: NXP Semiconductors

NXP Semiconductors
10. Dynamic characteristics
Table 6.
T
[1]
[2]
[3]
11. Application information
MPT612
Product data sheet
Symbol
External clock
f
T
t
t
t
t
Port pins (except PIO2 and PIO3)
t
t
I
t
osc
CHCX
CLCX
CLCH
CHCL
r(o)
f(o)
2
f(o)
amb
cy(clk)
C-bus pins (PIO2 and PIO3)
Parameters are valid over operating temperature range unless otherwise specified.
Typical ratings are not guaranteed. The values listed are at room temperature (25 °C), nominal supply voltages.
Bus capacitance C
= 0
°
C to 70
Dynamic characteristics
11.1.1 XTAL and RTC Printed Circuit Board (PCB) layout guidelines
11.1 XTAL1 input
Parameter
oscillator frequency
clock cycle time
clock HIGH time
clock LOW time
clock rise time
clock fall time
output rise time
output fall time
output fall time
°
C for commercial applications, -40
b
in pF, from 10 pF to 400 pF.
The input voltage to the on-chip oscillators is limited to 1.8 V. When the oscillator is
driven by a clock in slave mode, it is recommended that the input is coupled through a
capacitor with C
capacitor connected to ground (C
In slave mode, a minimum input voltage of 200 mV (RMS) is needed.
The crystal should be connected on the PCB as close as possible to the device’s
oscillator input and output pins. The load capacitors Cx1 and Cx2 and Cx3, in case of
third overtone crystal usage, must have a common ground plane. In addition, the external
components must also be connected to the ground plain.
Any loops must be made as small as possible to keep the noise coupled and parasitics in
via the PCB as small as possible. The values of Cx1 and Cx2 should be chosen smaller
accordingly to the increase in parasitics of the PCB layout.
The MPT612 IC can be used with accompanying software only. The MPT612 software
stack is designed to cater to different types of applications in the solar PV domain
ranging from simple MPPT charge controller to advanced systems on street lighting
applications to micro-inverters and DC-DC converters per panel.
All information provided in this document is subject to legal disclaimers.
i
= 100 pF. To limit the input voltage to the specified range, an additional
Rev. 2 — 14 September 2010
Conditions
V
°
IH
C to +85
to V
IL
g
), attenuates the input voltage by a factor C
°
°C for industrial applications, V
[1][2][3]
Min
10
40
T
T
-
-
-
-
20 + 0.1 × C
cy(clk)
cy(clk)
× 0.4
× 0.4
Maximum power point tracking IC
b
Typ
-
-
-
-
-
-
10
10
-
DDC
[1][2]
, V
DD(IO)
© NXP B.V. 2010. All rights reserved.
MPT612
Max
25
100
-
-
5
5
-
-
-
over ranges
i
/ (C
i
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
24 of 24
+ C
[1]
g
).