Hypertriton as a test of theoretical hyperon-nucleon potentials. II

A separable approximation to meson theoretic hyperon-nucleon potentials is made such that low-energy-scattering parameters are reproduced. Explicit $\ensuremath{\Lambda}N\ensuremath{-}\ensuremath{\Sigma}N$ coupling is neglected. The important tensor nature of triplet force is included. Several recently proposed hyperon-nucleon potentials lead to acceptable $_{\ensuremath{\Lambda}}^{3}\mathrm{H}$ binding energy estimates.