Datasheet PAM8904E (Diodes) - 5
| Manufacturer | Diodes |
| Description | 18VPP Output Piezo Sounder Driver |
| Pages / Page | 10 / 5 — PAM8904E. Application Information. Charge Pump Mode Setting. DIN. EN1. … |
| File Format / Size | PDF / 549 Kb |
| Document Language | English |
PAM8904E. Application Information. Charge Pump Mode Setting. DIN. EN1. EN2. MODE. T C. VDD Range. Mode. Timing Chart and Device Operation
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PAM8904E Application Information Charge Pump Mode Setting
The Charge Pump Mode (CPM) pins EN1 and EN2 are used to set the charge pump into mode 1x VDD, 2x VDD, 3x VDD or they can be used to put the PAM8904E in to a forced low current shutdown mode.
DIN EN1 EN2 MODE
0 — — Shutdown Mode 1 0 0 Shutdown Mode 1 0 1 1x Mode
T C
1 1 0 2x Mode
U
1 1 1 3x Mode
D O R VDD Range Mode P
1.5V to 4.5V 1x, 2x and 3x
W
1.5V to 5.5V 1x, 2x
E N Timing Chart and Device Operation
When one or both of the EN pins are pulled high, the device enters normal operation mode, refer to the above table for the mode selection. Once the PAM8904E senses a valid signal on the DIN pin, the charge pump will start and provide the desired voltage on the VOUT pin and the output drive VO1 and VO2 start to function after time tON which is typically between 470µs and 2s depending on the mode chosen. Once the input signal on DIN is removed, the PAM8904E senses this and waits typically 42ms to ensure the signal has been removed. If there is no further valid signal within the time period tOFF, the PAM8904E enters into a low current standby mode.
Timing Chart
tON tO FF PAM8904E 5 of 10 March 2019 Document number: DS41667 Rev. 1 - 2
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© Diodes Incorporated
The Charge Pump Mode (CPM) pins EN1 and EN2 are used to set the charge pump into mode 1x VDD, 2x VDD, 3x VDD or they can be used to put the PAM8904E in to a forced low current shutdown mode.
DIN EN1 EN2 MODE
0 — — Shutdown Mode 1 0 0 Shutdown Mode 1 0 1 1x Mode
T C
1 1 0 2x Mode
U
1 1 1 3x Mode
D O R VDD Range Mode P
1.5V to 4.5V 1x, 2x and 3x
W
1.5V to 5.5V 1x, 2x
E N Timing Chart and Device Operation
When one or both of the EN pins are pulled high, the device enters normal operation mode, refer to the above table for the mode selection. Once the PAM8904E senses a valid signal on the DIN pin, the charge pump will start and provide the desired voltage on the VOUT pin and the output drive VO1 and VO2 start to function after time tON which is typically between 470µs and 2s depending on the mode chosen. Once the input signal on DIN is removed, the PAM8904E senses this and waits typically 42ms to ensure the signal has been removed. If there is no further valid signal within the time period tOFF, the PAM8904E enters into a low current standby mode.
Timing Chart
tON tO FF PAM8904E 5 of 10 March 2019 Document number: DS41667 Rev. 1 - 2
www.diodes.com
© Diodes Incorporated
