ICE1HS01G-1 Datasheet, PDF (11/19 Pages) Infineon Technologies AG – Half-Bridge Resonant Controller

Half-Bridge Resonant Controller
ICE1HS01G-1
voltage. The charging time t_cha and discharging time
t_disc can be respectively approximated as
t_cha
=
–
ln
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è
èæ_{-èæ--VV-----}^BB_---^UU_---^SS_----^××_{---R-R-------R-R-----II----N}^-_N--^e-_e-----^q-_{S-qS-------1--1-}øö_{-øö----++-----}⁽⁽_--II--^I_-I-^NN_---^SS_---^TT_----^××_---RR----^ee_--^qq_--⁾_{-)---––----V-V----}^II_--^NN_---^SS_--^H_{-L-ø÷÷÷ö}
×
R_eq
×
C_INS
[8]
t_disc
=
–
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æ
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V-V----_BB^---_UU^---_SS^----××^{---R-R-----RR--------}_I^-I_---^eNe_-^N-----q_-^q---_S^-S--2-2----_1--^{1---–-–----VV----}_I^-I-_NN^---_SS^---_HL^-_{ø÷÷÷ö}
× R_eq2 × C_INS
[9]
In [8], R_eq is the equivalent resistance for paralleling of
R_INS1 and R_INS2.
1
R_eq = ------1--------------------1-------
R-----_I^-_N^----_S^---₁ ⁺ R-----_I^-_N^----_S^--₂^-
[10]
V_{INS_H}
VINS_L
t₁
t2
t3 _Time
Figure 14 VINS voltage waveform during blanking
time after OLP and before IC restarts
In [9], R_eq2 is the equivalent resistance for paralleling of
R_INS1, R_INS2 and R_Q3 (900ohm typically).
1
R_eq2 = -R---------_I--1-_N-------S----_{1-----+-----R---------I}--1-_N-------S-----_{2----+-----R-------1--Q}-------₃
[11]
IC will repeat the charging and discharging process for
N_{OLP_R} times. After that, IC will turn off the switches for
both charging and discharging. In addition, the current
source for hysteresis will be turned on and another
blanking time of T_{BL_VINS}, the time between t2 and t3 as
shown in Figure 14, will be added so that VINS pin fully
recovers and represents the bus voltage information.
IC will start the soft start after the additional blanking
time in case V_VINS is higher than the V_VINSon.
Vdd
IINST
ICE1HS01G
Q1
VINS
CV1
Ihys
1.25V
Mains_OK
Q2
4.5V
CV2
EnA
Q3
CV3
EnA
0.5V
RQ
SQ
Counter
CLK
TBL_VINS
20ms
AR_R
AR
Figure 13 Circuit connected to VINS pin
Version 2.0
11
02 July 2011