Fig 9. Configuration 1: Vbat Used To Generate Tvdd; Fig 10. Configuration 1: Tvdd Offset Behavior - NXP Semiconductors PN7150 Hardware Design Manual

NXP Semiconductors
Fig 9.
TVDD value shall be chosen according the minimum targeted VBAT value for which
reader mode shall work.

Fig 10. Configuration 1: TVDD offset behavior

For example, if chosen TVDD is 3.6V and current to be delivered by the TxLDO is Itx, it
means:
As the maximum current allowed is 180mA, a margin of 180mV between the VBAT and
the chosen TVDD value is needed to work on the regulated area of the LDO.
In Standby state, whenever TVDD is configured for 3V, 3.3V or 3.6V, TVDD is
regulated @2.5V
Table 5.
TVDD available voltage
AN11756
Application note
COMPANY PUBLIC
Configuration 1: VBAT used to generate TVDD
���� ���� ���������������� ≥ ( 3.6���� + 1Ω ∗ ���� ���� ���� ) ����ℎ�������� ���������������� = 3.6����
���� ���� 2.3���� ≤ ���������������� ≤ 3.6���� ����ℎ�������� ���������������� = ���������������� − 1Ω ∗ ���� ���� ����
Configuration 1 summary
Reader mode
3/3.3/3.6
All information provided in this document is subject to legal disclaimers.
Rev. 1.2 — 15 January 2018
347612
AN11756
PN7150 Hardware Design Guide
Card mode Standby mode
3/3.3/3.6
© NXP B.V. 2018. All rights reserved.
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