Specifications
LV5692P, LV5693P Application Note
http://onsemi.com
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5. Over -Current Protection
Each channel has an Over-Current Protection (OCP) circuit which is the "Fold-Back" type, OCP
circuit prevent IC’s break down at an over current condition. This circuit is useful against sudden
over current, but use of continuous operation is not allowed.
The limit value of output current is changed by ambient temperature and production tolerance.
However, the limiting value doesn't fall below the output maximum current defined by the
specification. When you use the output current exceeding the maximum current, the OCP circuit
might operate in some situations. Be sure to design the equipment, so that the output current is
below a specified maximum value.
6. Over-Voltage Protection
When VCC voltage exceeds 21V, the device detects over voltage condition and shuts down all
output except “VDD” to protect the device.
The peak voltage value (Vcc peak) changes depending on Surge-waveform condition. Adding
power clamp, such as power zenner diode, on battery connected line is recommended in order to
absorb applied surge.
7. Thermal shut-down
This IC has built-in thermal shut-down circuit to prevent from thermal damage. If the chip
temperature (Junction temperature:Tj) reaches 175℃, the thermal shut-down circuit operates.
When the thermal shut-down circuit operates, all outputs are turned off regardless of CTRL state.
Outputs remain disabled until the junction temperature drops below 145 ℃ (typ)(automatic
restoration). If the operating condition is not changing, the output repeats on and off. The output
seems to oscillate.
* The protector functions only improve the IC’s tolerance and they do not guarantee the safety of
the IC if used under the conditions out of safety range or ratings. Use of the IC such as use under
over-current protection range or thermal shutdown state may degrade the IC’s reliability and
eventually damage the IC.
Iout
Vout
Output current
Spec limit
(Iomax)
Output current
operating range
Limit Current
Changes in temperature, etc
Rload
Iout
Limit Current
Without OCP
OCP working area
Vreg
Rload
Iout≒