PRELIMINARY
CYW43438
20. System Power Consumption
Note: The values in this data sheet are design goals and are subject to change based on device characterization.Unless otherwise
stated, these values apply for the conditions specified in Table 24: “Recommended Operating Conditions and DC Characteristics” .
20.1 WLAN Current Consumption
Table 40 shows typical currents consumed by the CYW43438’s WLAN section. All values shown are with the Bluetooth core in Reset
mode with Bluetooth and FM off.
20.1.1 2.4 GHz Mode
Table 40. 2.4 GHz Mode WLAN Power Consumption
VBAT = 3.6V, VDDIO = 1.8V, TA 25°C
Mode
Rate
VBAT (mA)
Vio (μA)
Sleep Modes
Leakage (OFF)
Sleep (idle, unassociated) 1
N/A
0.0035
0.0058
0.0058
1.05
0.08
80
N/A
Sleep (idle, associated, inter-beacons) 2
IEEE Power Save PM1 DTIM1 (Avg.) 3
IEEE Power Save PM1 DTIM3 (Avg.) 4
IEEE Power Save PM2 DTIM1 (Avg.) 3
IEEE Power Save PM2 DTIM3 (Avg.) 4
Active Modes
Rate 1
Rate 1
Rate 1
Rate 1
Rate 1
80
74
0.35
86
1.05
74
0.35
86
Rx Listen Mode 5
N/A
37
39
12
12
12
12
12
15
15
15
15
Rate 1
Rate 11
Rate 54
40
Rx Active (at –50dBm RSSI) 6
40
Rate MCS7
41
Rate 1 @ 20 dBm
Rate 11 @ 18 dBm
Rate 54 @ 15 dBm
Rate MCS7 @ 15 dBm
320
290
260
260
Tx 6
1. Device is initialized in Sleep mode, but not associated.
2. Device is associated, and then enters Power Save mode (idle between beacons).
3. Beacon interval = 100 ms; beacon duration = 1 ms @ 1 Mbps (Integrated Sleep + wakeup + beacon).
4. Beacon interval = 300 ms; beacon duration = 1 ms @ 1 Mbps (Integrated Sleep + wakeup + beacon).
5. Carrier sense (CCA) when no carrier present.
6. Tx output power is measured on the chip-out side; duty cycle =100%. Tx Active mode is measured in Packet Engine mode (pseudo-random
data)
Document Number: 002-14796 Rev. *K
Page 88 of 101
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