L6599N STMicroelectronics, L6599N Datasheet - Page 23
![IC RESONANT CONVERTR CTRLR 16DIP](/photos/5/23/52339/497-16-dip_series_sml.jpg)
L6599N
Manufacturer Part Number
L6599N
Description
IC RESONANT CONVERTR CTRLR 16DIP
Manufacturer
STMicroelectronics
Type
Phase Shift Resonant Controllerr
Datasheet
1.L6599DTR.pdf
(36 pages)
Specifications of L6599N
Applications
Resonant Converter Controller
Voltage - Supply
8.85 V ~ 16 V
Current - Supply
3.5mA
Operating Temperature
0°C ~ 105°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Number Of Pwm Outputs
1
Switching Freq
500KHz
Operating Supply Voltage (max)
16V
Output Current
800A
Operating Temperature Classification
Automotive
Mounting
Through Hole
Pin Count
16
Package Type
PDIP
Number Of Outputs
Single Output
Switching Frequency
500 KHz
Operating Supply Voltage
8.85 V to 16 V
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 40 C
Mounting Style
Through Hole
Supply Voltage Range
8.85V To 16V
Digital Ic Case Style
DIP
No. Of Pins
16
Operating Temperature Range
-40°C To +150°C
Svhc
No SVHC (15-Dec-2010)
Base Number
6599
Device Type
Power
Rohs Compliant
Yes
For Use With
497-10542 - BOARD EVAL BASED ON L6599497-8429 - BOARD ADAPTER L6599/STP12NM50N497-8265 - BOARD EVAL BASED ON L6599497-5857 - DEMO BOARD FOR L6599497-5856 - DEMO BOARD FOR L6599497-5497 - EVAL BOARD FOR L6599497-5496 - EVAL BOARD FOR L6599
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Lead Free Status / Rohs Status
Compliant
Other names
497-5723
L6599NR
L6599NR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
L6599
7.4
Current sense, OCP and OLP
The resonant half-bridge is essentially voltage-mode controlled; hence a current sense input
will only serve as an overcurrent protection (OCP).
Unlike PWM-controlled converters, where energy flow is controlled by the duty cycle of the
primary switch (or switches), in a resonant half-bridge the duty cycle is fixed and energy flow
is controlled by its switching frequency. This impacts on the way current limitation can be
realized. While in PWM-controlled converters energy flow can be limited simply by
terminating switch conduction beforehand when the sensed current exceeds a preset
threshold (this is commonly now as cycle-by-cycle limitation), in a resonant half-bridge the
switching frequency, that is, its oscillator's frequency must be increased and this cannot be
done as quickly as turning off a switch: it takes at least the next oscillator cycle to see the
frequency change. This implies that to have an effective increase, able to change the energy
flow significantly, the rate of change of the frequency must be slower than the frequency
itself. This, in turn, implies that cycle-by-cycle limitation is not feasible and that, therefore,
the information on the primary current fed to the current sensing input must be somehow
averaged. Of course, the averaging time must not be too long to prevent the primary current
from reaching too high values.
In
described in the following. The circuit of
resistor Rs might not be negligible, hurting efficiency; the circuit of
complex but virtually lossless and recommended when the efficiency target is very high.
Figure 30. Current sensing technique with sense resistor
Figure 30 and Figure 31
L6599
6
a couple of current sensing methods are illustrated that will be
ISEN
τ
≈
f
10
min
Figure 30
Rs
Cr
is simpler but the dissipation on the sense
I
Cr
Vspk
0
Application information
Figure 31
is more
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