Cypress EZ-PD CY4533 Manuale - Pagina 12
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For scenarios where the operating current value ISNK is greater than 5A (i.e. ISNK_COARSE + ISNK_FINE >
5A), the
BCR device will limit the Operating Current (ISNK) value to 5A.
Table 2-3. Resistor Divider Values for Achieving Desired ISNK_COARSE Current Values
Voltage on ISNK_COARSE
(V)
3.3 * (0/6)
3.3 * (1/6)
3.3 * (2/6)
3.3 * (3/6)
3.3 * (4/6)
3.3 * (6/6)
Table 2-4. Resistor Divider Values for Achieving Desired ISNK_FINE Current Values
Voltage on ISNK_FINE (V)
3.3 * (0/6)
3.3 * (1/6)
3.3 * (2/6)
3.3 * (3/6)
3.3 * (6/6)
See
Changing VBUS Voltage and Current Requested from Power Adapter
pins to select VBUS voltages and how you can change them.
2.3.4 FAULT LED and Safe 5V Load Switch
The FAULT LED is turned ON in the following conditions:
The Type-C power adapter cannot provide the voltages or current required by the system.
CY4533 EZ-PD™ BCR Evaluation Kit Guide, Document Number: 002-25263 Rev. *B
Pull-Up Resistor on
ISNK_COARSE (R10)
(kΩ)
None (DNP)
5
5
5
5
0
Pull-Up Resistor on
ISNK_FINE (R13) (kΩ)
None
5
5
5
0
Figure 2-8. Red FAULT LED and Safe 5 V Load Switch
Pull-Down Resistor on
ISNK_COARSE (R12)
(kΩ)
0
1
2.4
5
10
None (DNP)
Pull-Down Resistor on
ISNK_FINE (R4) (kΩ)
0
1
2.4
5
None (DNP)
for more details on how the BCR uses these
Hardware
ISNK_COARSE
(A)
0
1
2
3
4
5
ISNK_FINE (mA)
0
250
500
750
900
12