7.2.1.3 Application Curve

VIN (V)

Figure 7-9. Hysteresis Transfer Curve using TLV3603-EP

7.2.2 Optical Receiver

The TLV3603-EP can be used in conjunction with a high speed amplifier such as the OPA830-EP to create an

optical receiver as shown in the figure below. The photodiode is connected to a bias voltage and is being driven

with a pulsed laser. The OPA830-EP takes the current conducting through the diode and translates the voltage

for the high speed comparator to detect. The comparator then outputs the proper output level according to the

threshold set (VREF).

+

TDC

V

BIAS

+

LE/HYST

TLV3603-EP

V

REF

OPA830-EP

Figure 7-10. Optical Receiver

7.2.3 Over-Current Latch Condition

When the design is required to detect a brief over-current condition, the latching feature of the TLV3603-EP can

be utilized. By latching the comparator output, the MCU does not miss the over-current occurrence. The circuit

below shows one way to implement the latching function.

When an over-current condition is detected by the TLV3603-EP, the output transitions high. The occurrence

of the output going high coupled with a logic high from the RESET signal from the MCU creates a logic low

signal at the output of the 2-channel NAND gate. This causees the output of the TLV3603-EP to be held in

a logic high state (latched), thus allowing the MCU to detect the fault condition regardless of how narrow the

over-current condition persists. The addition of the NAND gate also provides a means of clearing the latch state

of the comparator once the MCU is done processing the event. This is accomplished by the MCU passing a logic

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TLV3603-EP

SNOSDK3 – SEPTEMBER 2024

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