STMicroelectronics L6562A Evaluation Board STEVAL-ILL034V1 STEVAL-ILL034V1 STEVAL-ILL034V1 Data Sheet

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The L6562A is not a direct drop-in replacement of the L6562, even if both have the same 
pin-out. One function (Disable) has been relocated. 
Table 2 compares the two devices, i.e. those parameters that may result in different values 
of the external components. The parameters that have the most significant impact on the 
design, i.e. that definitely require external component changes when converting an L6562-
based design to the L6562A, are highlighted in bold. 

The lower value (-36%) for the clamp level of the current sense reference voltage allows the 
use of a lower sense resistor for the same peak current, with a proportional reduction of the 
associated power dissipation. Essentially, the advantage is the reduction of the power 
dissipated in a single point (hotspot), which is a considerable benefit in applications where 
heat removal is critical, e.g. in adapters enclosed in a sealed plastic case. The lower value 
for the Dynamic OVP triggering current allows the use of a higher resistance value (+48%) 
for the upper resistor of the divider sensing the output voltage of the PFC stage (keeping the 
same overvoltage level) with no significant increase of noise sensitivity. This reduction goes 
in favor of standby consumption in applications required to comply with energy saving 
regulations. 

IC turn-on & turn-off thresholds (typ.) 

12/9.5 V 

12.5/10 V 

Turn-off threshold spread (max.) 

±0.8 V 

±0.5 V 

IC consumption before start-up (max.) 

70 uA 

60 uA 

Multiplier gain (typ.) 

0.6 

0.38 

Current sense propagation delay (delay-to-output) (typ.) 

200 ns 

175 ns 

ZCD arm/trigger/clamp thresholds (typ.) 

2.1/1.4/0.7 V 

1.4/0.7/0 V 

Enable threshold (typ.) 

0.3 V 

(1)

1.

Function located on pin 5 (ZCD)

0.45 V 

(2)

2.

Function located on pin 1 (INV)

Gate-driver internal drop (max.) 

2.6 V 

2.2 V 

Leading-edge blanking on current sense 

No 

Yes