DS1650 Datasheet, PDF (16/26 Pages) National Semiconductor (TI) – Quad Differential Line Receivers

RT1650
Memory) is primarily used to save non-volatile user
setting data and part of MTP store internal factory
setting. User firmware can control some of chip
hardware behavior via peripheral registers. It also could
be an interface to communicate with external I²C via
the registers.
0x0000_0000
0x0000_7FFF
0x2000_0000
0x2000_03FF
ROM / OTP
32 KB
reserved
SRAM
1 KB
reserved
Code
SRAM
0x4000_0000
0x4000_01FF
MTP
272B
reserved
Peripheral
0x5000_0000
0x5000_1FFF
Peripheral
Register
Programmable Dynamic Rectifier Voltage Control
The RT1650 provides a programmable Dynamic
Rectifier Voltage Control function to optimize the
transient response and power efficiency for
applications. Table 1 and Figure 4 show an example to
summarize how the rectifier behavior is dynamically
adjusted based the registers VRECT_SETx[7:0] (x = 1 to
4), which are available to be programmed by users.
Table 1. Dynamic Rectifier Voltage Setting
Output Current, I_OUT
Rectifier Voltage Target
< IOUT_TH1
VRECT_SET1
IOUT_TH1 to IOUT_TH2
VRECT_SET2
IOUT_TH2 to IOUT_TH3
VRECT_SET3
> IOUT_TH3
VRECT_SET4
Figure 3. Memory Map
V_{RECT_SET1}
V_{RECT_SET2}
V_{RECT_SET3}
V_{RECT_SET4}
UVLO
Dynamic Operation
Area
Overloading
Operation Area
OTP Triggered
I_{OUT_TH1} I_{OUT_TH2} ^IOUT_TH3
If Ext. Charger w/ DPM
(ex. VDPM = 4.9V)
V_RECT Tracking Stop Above
UVLO
I_{OUT_LIMIT}
V_OUT
V_RECT
I (A)
Figure 4. Dynamic Rectifier Voltage vs. Output Current
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DS1650-00 July 2015