LM49350RLX/NOPB National Semiconductor, LM49350RLX/NOPB Datasheet - Page 36

• Manufacturer Part Number: LM49350RLX/NOPB
• Description: IC AUDIO SUBSYSTM .8W D 36USMDXT
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class Dr

Specifications of LM49350RLX/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 2W x 1 @ 4 Ohm; 69mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49350RLX

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19.0 PLL Setup Registers
The LM49350 contains two PLLs for flexible operation of its dual audio ports. PLL1 has a P1 and P2 output divider thereby allowing
PLL1 to generate two distinct clock outputs. The equations for PLL1's generated output clocks are as follows:
where:
The equations for PLL2's generated output clock are as follows:
where:
The VCO frequency and comparison frequencies are as follows:
Keep f
f
f
N
M
P
P
f
N
M
P = (PLL2_P + 1) / 2
f
f
OUT1
OUT2
OUT3
VCO
COMP
1
2
1
2
1
2
= (PLL1_P1 + 1) / 2
= (PLL1_P2 + 1) / 2
= PLL1_N + PLL1_N_MOD
= PLL2_N + PLL2_N_MOD
= (PLL1_M + 1) / 2
= (PLL2_M + 1) / 2
VCO
= f
= (f
= (f
= (f
= f
OUT
between 140MHz to 240MHz and keep f
IN
IN
IN
IN
/M
.N
.P
. N
. N
2
1
1
/ M
/ M
/ M
2
.P)
1
1
. P
. P
1
2
)
)
COMP
FIGURE 13. PLL1 Loop
FIGURE 14. PLL2 Loop
between 700kHz to 5MHz.
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